Document ZnXQ91awQQozRbLMkKawk065O

LI 407161 A .5 ----- ------- iM k ..... . ^ . nooDiAS mum Joftmt 31# 13SS .. -: v;; uu> vctsmta xsscaitim 60 t*\ hied St. *mt forte 1?# I. I, Tha Ioad Xndoatr&aa Aaaodatloo haa Joat laaoad *#*d load Taoholeal lottar Mo. 11 - Hec--iv14 Surfaoa Preparation of Stool for Had Uad Palnta,* This la tba fint of tha .V**oci*tloo** aarlaa ef Rad Uid Technical Lottara to daal with aorfaoa preparation of ataal prior to tha application of prlaar pdnta. Previoua Technical lattan confined thaaaalrea to racoon*txiad rad load prlnar 9 fcrntlationa* lb* artraan lapcrtanoa# however# of aurfaoa pnparatloa for tha praptr portcraanoe of any octal protaotlaa paint haa lad tha iatodatian to propan thaaa raeoaweodatlco* to aid tha inda*trial uaer to cattle* tha loot**t pcaaiUe aanrlea Ufa oat of hi* paint* Xa addition it eootaln* a handf quick reference tabla lndleatlnf tba raeoaoMndad aorfaoa praparatloa aathoda for apaelfie type# of ataal atroctoroa* t o d load prloera# axpoaore condition# and dryia* tinea* - Copia of Rod load Technical Uttar Wo. 11 wqr ha had# fraa of chare*# by writing to Uad Xnduatriaa iaaoclation# 0 laat l*2nd Street, *nr Tork IT# X# T s ..... ...................... ...................... , I 9 RECOMMENDED SURFACE PREPARATION of STEEL for RED LEAD PAINTS 1.K.: .............................................. s lltwricrnn or IU Um................................. S Wwr Sw m hmruurtnri................... ... . . . I Wnr t o Consn m Sh t it o o . < Memo* or So t t ac * f-- i i rwr ...... 4 Swrut hirtMiw Mimoa J. . 4 Srana IWutnM or 5m, lUcotnmnm m to Uua Fm / (Quick Mtnota twiiy).................................. LIAO INDUSTMS ASSOCIATION M (AST 4U4 mm MOW TOM Ir, N. V. ft Foreword IN preview* IM Lml Tidbaial LMm, tbo Rad Load Tidulctl CooaltM of ik ^ Lead laduatriea Aaaodatiao baa con8aod toeJf to tbo recmsmeodatioo of rod M primer formulation aad U Ul othar oonddaratiana laeotvad la painting to bo mewed by tbo tuer from otbar aooreao Tbo ortnna baportipeo, however, of auifaea preparation far tbo proper performance of any maul protective point, boo new lo4 the Committee to pnporo tbo recommendation* ooatilaod la tbit Tadafael Lattar to aid tbo lorbatrial war la getting tbo loog*at paetibfa aartioo Ufa out of hi* paint Tba mcnem or faibim of a peiot *yt*at afar efi, very often depead* epoo tbo adaqaaop of tbo tadact preparetica. freper *arface preparation Manet be tirmmd fan tfrongfe. TUb Ticboki} tjf--ir Inclodat i fbott of Msfie# impanboi It ampbatho tbo difaraacta and emptetaoem cl aatfaco eaotaatiaaat ' mmoeol by tbo meat widely need method*. A bating of aoifoea preparation mjoirameot* applicable to a number of painting coodttioaa for which red lead primer* am moomcneoded b aiao included. Fcrmnla* far aS tbo palata bated am connfood ia pravion Sad Land Technical Lattan (them am tvaiUbla, at no charge, upon raquaat la tba toad ladmtiim Anoclatioa). tnqntriea regarding thb Technical Latteror tpadle patatiagpmblaw ami and chouid be oddmnad to tbo Land ladaatriea Aaaociatioa or to tbo ftodhridnala ia tbo oooparatiog oocapaoiao batad baloar. . M 010.0 aa Om i CIQraaa. CWnit OaBat M. PatoOL Caaaaa CBy 0. (Ma.). Maw Obao Kw fad IT, rWMalpW t Fanfewd. it Oa tU ftdie Caaali AanaMad lmd aa4 Ztm Cmmaae, |^aia A Lae Anaaiaa ait gaa fnrtrtrrr T* W. 0. NUN A (OaOMT. 001 .1Ma haa fimaln A.*da. (MM, Hank, fatdaal |0n|, I tab takaC*y. taeDwea.lack|**aaa. Timan., T.Hna (Wnh COMMMT...............I1M000 (OMaaiaon CCaenran--rraareea OMaOSag. Oieilaaf It Ohio i am* a r. oa. a nro AOaata. OeWaa. tfWa.nah, Haw Tart lee* Madman* <M. J ), lea Aiaan 0 EMae Dti-veon, Chicago. AaaVn Tone Wade DTrtnoe. Ha CwrfceO Too * Vrraid. DWWna. la Lee* Kabloa Tote * Vrm* DMOaa, CMaaai A- Wfltain Compear DMrtoa, Mediae CraadUe CMaa Tweran O|Mina|ir|a-Ip EMn-aoao 0- Mrukt E-MrMee, Boirtnoia. Cnflhnrflle |0L). ftaamaan tummom u*o oooowen, mc fe;. & 1 Adaala, M* t CVkaaa 0, OartaaoO I, CMwl It Mo I, fVil.rt.f(dda It TuoUni It la Cnth t la Trie. err Ut irnno t tlrrlnn 10 (W. Va I, lamia . Laa Aagoiaa M, OUiaw UAO rooowen coanoirr . OOP . PartiM Way, taa iiapalaa M. fiMinda 1114 Ii iiO Huat, Eertaley tl > arha Mean I IM. a ia MO Medr Q PBMBBgB 88SSBSSHI -sea# LIA07164 O RECOMMENDED SURFACE PREPARATION OF STEEL FOR RED LEAD PAINTS Why Surface Preparation? 'T'HK muon for surface preparation k to renon contaminant* tad improve adhesion of t priming point. Adhesioa it too boodiag of the priming paint to the surface to which the print it tpp^od. Print wiU (til in direct proportion In to Uok of idheaton. MiS aeale, rntt, dirt, grit, od, pent*, chcraicati. tod other surface contaminants male good print performance impossible by preventing wotting of the metal But. when It k printed over, con tinue* to Fora tad eveotuaOy destroy* tin ad hesion of the print file*. Lihevrira aiS scale k Uhriy to bn undermined by mat. Mott structural Km! k bet formed! ft k cartrod with t mixture of iron oridet erilnd aiS scale, which it of variable thickaea*. continuity tnd adhesion. Mffl tctl# it brittle and it mriniy magnetic iron oxide, Fe,0^ Don to teriag or da difference in ooefident of rtrpansk* between tbn mill tori# and da baa metal, da mlB tcrin crack* when change* ia temperature tola place. If moisture enten t crick in miS writ, rusting of da baa meet! begina. At the rant creep* trader tbn mill tcala, adhesion k destroyed. ton** or semi-loo** mill tcrin in tiro* bnconat completely detached from da baa metri. Raptare tad tealing of tbn ptiot cent follow*. Tightly adhering area* of mil] tcala, through dectrochcsrJcri action mty provide tulBcient localised oorrosiee to produce pit*, whkh m*y In tina penetrate da bun metri. Preen and ON Creau tad oO tr* detriment*] to tdbmien betwena the priming paint tad tbn natal sur(tea. Small object* nay have tbn petit tad <ri removed by t number of eepor degreasing commercial technique*. On large object*, don to their (tie nod shape, tbn grease tod oil am removed by washing or wiping with * eatobln Weld deports tucb u wrid loz deg, vrdd Sox fume*. weld beet oxide*, tad weld natal rpattar, are trufaco contamlnanta. Electric tro woi4 ia puticuW to 0 fOQflwitfO leaser meat, da acetylene weld total amt bn denned before painting. Tbn weld Sox tUg romxlaing adjacent to da weld team k Wrongly Pallia. Under humid condition* * saponifies the print vehicle, formfc* fatty acid leapt which reduce adhesion of the print film tod, either through actual pore* in da fihs or by onaotie action, wrier k drawn through da film to promote further oatrothm. The weld fiux fumee after condensation are deported noticeably in a band S to S In. en either side of the weld seem. Spray painting fed* to disturb da condensate, which in coo- Junctioo with weld lux dag may cause corration to spread n eoosiderebln distance from the weld worn, Brash applied pelnt dilate* the weld fits fun# coodle&oto Imw q s tbt Sotcndty ssd arm of action. The weld beet aside* are concentrated on (bn weld *mm ia a band about t In. wide on either aide of da seam. Them oridm form irregular tad rough drpotto and crest* unequal pain* fibs thldtwm. The thin spots to the patat thereby promote eariy film failure and term at corroricu notm The wrid metri rpattar deports nag* bum microscopic particle# to particle* K in. to diam eter. 7b* larger da spatter da morn fialy tbn patter ia welded to da surface. Paint Bat arm the** spatters fail prematurely do* to inadequate fibs thicks*** oo the top of tbe natal ipattor or to the inability of paint to ant** the Junction between the apatter and da metri. Since paint film UOuru, In general radiate* from pinhead nut spots often uaodatod with us, tug and spatters, tbeu depoeto must bn removed by grinding or blasting or both before painting If an adequatt, uniform film thlcfcneae ia desired. Whan cleaned, the wild teams nay be cpoetad to gtv* almoet at good service the adjacent metal surface, $ r. F-. S'' * * fe; I" I 'l WMawBwaassa w LI A07165 What to Contkior bi SotocHofl a Mathod of Surfaco Preparation The question of selecting t method of surface preparation depeodi upon * number of hctoa other then the economic conditione Involved. Among there erw L Condition of dm surface to be printed, t. Type of service to which the metal cad paint will be (objected, g. Practicality of using a particular method because of ecrirooment, end 4. The type of paint which ie to be applied. The requirements for surface preperatioo ate mare arvete u the wetting ability of the print decrease*. One reojon why the anticorrosive red lead pigment in linseed oil paint, LLA. Formula 5-1 (the lame el Fed. Spec. TT-F-Me, Type t or SSPC Print 1-5ST) hri achieved ta eminent reputation for protection of steel k due to its superior wetting characteristics. It bar demonstrated eatellent anticorrosion performance when uaed over steel where snail amounts of rust end tightly adherent mSS scale are preear*. A surface cooditioa such is this is often the best that can practically ha obtained In the field. Equally good remits are being obtained by similar high red lead ia oil ryrtcms, which have good wetting chaiartariatia. at uaed by railroads, public utOitiea, highway department* and others. The linseed ed vehicle, however, I* slow dip* tog and It is often necessary ta urn a farter dry ing oH-retto vehicle combination such aa JL1A. Formula 5-7 (TT-P-Wa, Type ). Such a paint la limited to it* wetting sbaity by the preaeneo of syntbetie retina. Therefore, surfaces teceMag patois at this type must be more carefully cleaned of corrosion products and mntsmlnants t maximum performance la npeetti. Coing still further, painting requirements may necessitate the use of the very rapid drying syn thetic vehicle type paints, such m LLA. For mulas 5-7. or 5-U (TT-P-bfia, Typ* HI) or 5-If, (MIL-F-175t5) (Bu Shipa Faint Formula No. 116). Them paints are useful and esceflent when applied over carefully prepared surface*. The following are the recommended methods for the surface preperatioo of steel to which red lead paint is to be applied, along with a tabio indicating the type of structural steal, the porura, drying time, LiA. recommended red bad paint and specification fat the recommended l k-:: * * Surfaco Preparation Motfuxf* Factors to ha ooaaidered ta selection of any metal protective petota are surfaco preperatioo and the cooditioa of the mrface at the than of application, the charactar of tha base mtial and the environmental exposure. Only those surface preparation methods which are pertinent to structural steel cleaning and which are moat generally uaed are cooaidersd to thia Technical Letter. Tha major methods at surface preparation el steel may be oUsseJ undar three caleforieai L Mechanics] surface prepatation L Hand rioaning L Fowar tool daaatog S. Sand or shot bleating 4 Flams cleaning O. Chemical surface preparation L Weathering Qumkil ihnlnf t. AQc j II rlcwinirm b, Pidding B. Staem droning & Phosphate surface treslmeot QL Solveot deantog and dagrsating Tha following are general descriptions of the rt ore-common surfsce preparation methods. Un der each beading will be found a reference to the detailed spetificattou foe that method, which ippean to Volume II, Steal Structures Painting Manual, published by Steel Structures Painting Council, 4400 Fifth Avacua, Pittsburgh 14 Pa. $ -.." " . ) \' .............. . m min i. \;......... LIA07166 ,4 ifii 'iiM iliiiiih MIQUMKM SUVAO MVMAIMN ef 800 to 8000 r.pj*. aadar load, wUs du Mm4 a--lag 0SFC4F IJB7) rotational speed of the pneumatic driven brush** b regulated by tbt tb preasur* and th* volume Hand rMsnlng it best adapted to iput dean- of the ah. Power brushes Buy cut through thia lag for mamtenlnc* repainting tad b Dot reo- stiH acol* but the wear on th* brush b excusiv*. osiwnondad far utt over Urge areas where more Tb* power brash must ba kept staving to pre effective method* are trail*bit. It Kid ody tbt vent burnishing which produces t poor redact high rpotj of t surface. Tbt operation k cnoat far painting. commonly accomplished with stiff, springy wirt Crfnden and sandors are sfsctjrs it Os* prep bnuheo, tbrtbra paper or doth, icnpan, ktirat, aration of t surface when tbt tbrasivt grit tie* chimb, or chipping Wwt it carefully selected for th* fob at hand. Tbt hood cleaning operatic* racial with tbt Whd# power operated scaling tad chipping typ* <d miU tctlt tod depth of common. Wirt h*earners are faster that tb* htad oparatad brushing b oot of tht oidett methodt of mt> typo, they are alow M compared to other mg thtaictl surface preparation tad generally pta- abl* methods. For very thick surface aerstaws- tia&y removal only iooidy adhering miO tctlt, Uticoa, they hove merit The tool asust be kept nut, old paint flat, tad dried or coked *oL sharp. Th* operator Blast be careful not It It doe* not remove adhering mill Kata. If strati remove sewnd metal, drive miQ scale lato soft fied rust is present, it should first b* removed by metal, or leave metal bum o* th* surface, tha chipping aad scraping before bead brushing. A Utter two oonditioe* rrestrfbuta to enriy point surface which a Sot end fret of obstructions tad Mure. irregularities may be bead bruthed it t nil of Qfl and gnus should b* removed by icilyout two quart feet pm minuta. cleaning before power tool cleaning b preraat Chipping hammers nmovt moat of the adB spreading. celt, bat if the action b too rigorous over this fa either head rimming or power tool dsto metal. It any deform or even pierce the metal. lag a prieur coot cf red laodpaiat should bo Chipping may drive mill satis or comniao prod applied before any rusting becomes vbibla A uct! into e eoft metal rurface. Chipping b usu paint system of two initial coats of red load ally followed by either wire brushing or scrap primer followed by sttftohU finish coota wiS giro ing or both to remove loose mQ tout or paint oacuBeat serolog " Elms. Unless care b eaercued, soma imbedded DiQ scale may remain which may must localized twwd or Prat Metering (SSFC4F MIT) early paint fadura. Hoad acraping aloot with t sharp-edged Sand or shat blasting procedures or* employed scraper b probably one of tbt lent effective methods of surface cleaning of metal ai K re where oQ th* miS soak, met, rast-ecel*, lorebpt nutter (except heavy deposits of grease or oft), ( move* only semi-adhering mid scale tad old point film*. If oil or grease art present, advent cleaning with frequent choogee of the advent should precede band cleaning; otherwiae od or grease will be spread over the descaled beat metal. or point are to be removed and tb* base or "whits* metal exposed for point application. Both processes are based upon the abrasive am Uoo oo the surface of various sherd particles of load, shot, grit or other tbrastves being dis charged, either wet or dry, at high pressure. Should eapiooive rapoc* be present. a special Metal or noo-metallie synthetic shot or grit ir aon-eptrking wire or tool must be employed, usually amployed where recovery cf tb* abrad ing agent u possible, while sand is used pri ' feotr Teel CTenalng (SVC-3F S4Q1) marily for operation* fas which ft* abrading agent k expendable. Hoad cleaning sMthodi are duplicated by Successful blasting techniques require care power tools designed far brushing, sanding, ful consideration of pressures, six* of aosxtg grinding, scaling. Impact denning or chipping. distance of notesie from th* surfsee, kind of ma Tbt general sequence of operational technique* terial to be removed, type of ebrmrfv*, loss of are the tame at under hand cleaning. Power abmstva, health Hazard, cost of abraofve, aad trd cleaning b store effective aad more eeo- type of surface preporatiou required, tonvlcol than bond cleaning for larger surface*. The grit thcarld oe of sdBcteody smell siae A larg* variety cf shapes and sixes of brushes, to remove effectively th* surface contaniinants grinders ead Sanders ore araflabl* and are mostly without taoeaaiv* working cf th* metal surface of the rotary type. Tb* electrically operated or th* formatioo of crater-lika rorfeo* depres rotary brush** are elective at operational speed* sion*, ridgos or mmol bain. Tbt paint may Dot fe. t. h $ ii. i. |S"wrr5?' p-.v- -r ; ; i ^pj^pppp^piipg LIAC7167 ^Ste#aiiiiiMaIMaSiiati aaHMUhn provide adequate Cm thick*sea w the ridgae aqaeat Innaming of tba nil Kale by creeping or Opt of the natal hairs, and tint they become of the not between the mJS scale and the haa focal points of premature paint tin failure. El- oearivs surface working of the natal may 6e- metal la ata nontba to a year anal of tba looaaood mil acala wit bava fallen cC Any relop unequal atresias la some surface areas and remaining product! cf corroatoa and partially bscooM oBtbodio to **^<^** arcot Tbit wifi loosened mil Kale must ba ramovad nr sand icotUnti cotroiioo m tbo point fits o q b mb m blasting wire brushing, scraping or dUpotag to fafl. bafora tba aurfaoa Is primed. Areas of tightly Dry sandblasting although widely used, drould adhering ml] scale can only ba completely re be dooe wtti due health precautions. sot only moved by sandblasting. Once tba base natal to protect tba operator horn fine abrasive deal la ttpoted Jt should ba immediately coated with blit ftljO OtkhW wloDMB fai tb# lovi^ red lead primer. Usually, ta dear weatbuc, 0O&MNB& MifhlTWfjr to tto vid&ity of nadbtoil* si* hours or lata wffl serve ae a safe ttaaa tater tag oparatloaa should ba skidded val between completion of ssndhhsting and Wat or hydraulic sand or tbot Matting alhnt- application of t red lead primer. aatae abrasive duet hazards, bat t water soluble Field reports Indicate this method of mfann tahlhttars ruck aj ebramata or pboapbata typaa preporettan followed by ten coats cf a tad lead are used tbey preaent fifareat health beards primer paint and a suitable top coat aril providn whicb aauat be met with proper praoaottacM. from I to 10 years of adequate protection. Tba tone lag between compleOce of blaittag and priming la dependent npoa tba typo of bleat ing, tba banidity of tba tunoundtagl or tba prraenct of soluble tablbhon to tba wet bleating Said. Any bleated surface should ba forth** cbemkaDy treated or primed eritb tad lead Alkali rlaanlng Is more KU^e --uf fwy Imk paint before any visible mating oocura. ardour than solvent cleaning. AOcaH rleansas On aotfaoa* prepared by tend or abot bleat include soak teak denning, ptesaure rpaay dsan ing two primer coeta of rad lead paint followed tag eleetrolytie denning scrubbing and break by a mlithie Inlab coat rhonM giva 10 to tt tag for structural steal srambllra. j yee of wrloa Alkali rleanlng removes ol, grease and soluble rt stimulators. Alkali rleanlng dose not re move heavy or carbonised olt or not tablhltlva Home Claawtag CWC-to a-S7T) culs. Tba surface It left alkaline and before Flame droning nay ba atad oa many fabrfcelad ibapaa where tba structural aectlona era of proper stock thickness, era readily accessible, painting It must ba rinsed ta a dilute add water solution to prevent sapouiicstion of n prion* vahidto not subject to warping and where dehydration cf tba aurfaoa it mandatory. Flame cleaned sur- fcat amt ba painted before modeneeiloa oom- meooea; hence, tbey should be painted wbOa Kill warm and dry. Recommended practice re quire# painting within two boon; Flame cleaning la uaad to remove unbonded bl CS ffW tTM^ old mill wtJdi ht$ not boos previously painted. Rarely done lame daantag remove a.0 the mill Kale. It oust ba followed by wire bruihiag tad duatiag before priming. Flana cleaning ihould not ba toad oa Koca leas thaa VII ta. thick. Pfckftty (WC-VUSt) Pickling la aa effective method of surface preparation for painting Mil scale and corrosion product! are completely removed by pi-Htf degreased iron or steel to dilute add solution Tba main disadvantage of this method Ueo is the necessity for following the pickling with neutralizing and water rinsing operation to re move al free add and reaction products, and then a rinsing ta either dilute phosphoric add or chromic add solution or mistime of thorn to create aa inhibited metal surface. This must bn followed by a thorough drying of tba natal nm> face prior to patattag ernmeu M>a miMunM Tba undesiraUa attack of the bate metal by Wenthertag {ISfCV f T> tba pickling add It asinimiaed and regulated by the use of suitable Inhibitors which may be die- Possibly tba oldaK rurface deaaing operation solved hi the pickling bath. Three tabibltott Is ttmoapberie waethartog a proceaa whereby create and rvgutsle a preferential selective eg the removal of tba mill aoala la primarily depend- tack oa tba mil scale and corroaioa product*. aot npoa the correeloa cf tba metal and tba rub- The surface should not ba etched sacaetivaly. r X.' 9 & r* Bwauwija^^ LIA07168 ,, , - m ---- 5 ? 1 but *<4>U| 0I A* ^u iiL<bI a>fV>^a4i^ gf Ac |A a tfc# am Cbu, This type of tube* preparation Ji limited mein)y to attbar smell stee objects or atraetaial drapes tint an seedy handled. lC*d iecd primer pt*-***g ci tbc pictWrt mw (mc 9 rixwM be <bm befeve tb# tUt fia lift by tba cbamicsl treatment riwwf aay vfafblo algne el corrosion. After this type of satiecs preparation, M coata of rad lead primer paint followed by a mtt&blc top cott pm edc^uetc nmki far 10 to llyaem. Where tba rise, shape or location ntaVaa * Im possible to solvent wipe the surface, steam rlaao tag la becoming rjuite {corral to laid surface preparation. Steam cleaning rmww dirt, gihn^ imm igf loom tri dm Mt macre rut or mitt scale. Tba moat atoam claaaiog fnrlndcs da addition of detergents to tba team-avatar mfat- tmra. If the detergent-ateam-watsr mixture it aaSdeutly alkaline. t arill aW manone grease. The airfare after ataa cleaning la noisily al kaline sad must ba adequately rinsed to prevent saponification of tbs pais* vabkfa. Hnaplato Man biata.at (SSK-TT i~S3T) fboapbata treatment Uavaa tha surface ia a satisfactory condition fay maxfemun paint Ufa, but H docs oot removn/laill acaia /TbarWora, far tbs moat tfldnt treatment tba surfaes should ba pkilod or blasted prior to pboapbata treat* moot. Insoluble metal phosphates resulting from tba pboapbata treatment extend tba Ufa of tba paint EUa by improving adbmioa. retarding aa* darlfaa corrosion, reducteg alartioclwmlijil am boa aad tba daooaaposUoa of the nafat vshkfa by corrosion products. Tba matai pboapbata tor* faen la tenet and larfbla aooogh to withstand thermal Tba pboapbata treebaaot baa beeo appbad by spray procaaa, hamarekm, brushing, portable nnv KRiiflAiBL Tba MUeCJOSn aperilretfaai may be cononltad far dataik Tba V. S. Cop of Fagtaaara Msanal far Fafatfag (1983) rafars to cold pboa- or dtmkiil motel toudltioMfS When properly applied, pboapbata mifaco braatowat baa baaa successfully aaad on abtp plates, rtear dam gates, locks, ate. Tba petal appbcaboa aad teniae am tba aaaw as far pickled boa or steal. mvwr auMMB a mi main (S3K4P l-*n> Structural steal may ba solvent rlaaoad by wiping, dipping, or graying, depeadtag apoa tbs atto of tba amoeban. Wiping b widely aaad. It rwmvia tba cd aad greats readily aad repbSy aad require* a mlnbaww of tear space. Ia tba tne of sotveat cleaning far wiping tba solvent must ba changed frequently to pray sag aprasdiag of tba oil and grease, aad daa precan* tioa. dependingjipoo tba aolveat employed. meat ba observed to guard agaiasC Ire hazards aad tadesry of dm solvent Solvent dieeatag doas not remove nut or mil scale. Military Specification, MEUP-USa, gtvao cleaning methods for steal aad mentions tbs type of petrolena solvent to nse. Fodsaal SpaefiIceiioo P-S-a61 or ASTM Specilcatioa 04344* cover tba asa of "Stoddard Sotveat* Federal specifications am svadabla far moat of tba Im portant rnlvaatg. '4 i a SB RgiWIPW I LI 407169 MjMakmtM IrtSTiagWy Surfoca Preparation of Steel Recommended for Red lead Point* IQakdi IWtrwn lawqd t/Xmll-- taFakXi SlwMvrf 9imI dalMIVat adCavaaaaai lit mit ala fcdaSi51-. fir--1^Ih CNtaateto4 AaddW DtteTaer Het'atrad tm Mat. Mat. n-ath* M UmI frtwtli LXA.S4 LUM Aad*#* taatar* XamaMnda^ Uaad Cheater IWOHWIIT fata Toad Ckaatef nctftar Uaot CWaaiM SBCWMIT nurtsrnn Mltaa itaaa v*-- Wwi CMm thn*4 OdwCMM ssrcvH! It Ha. ULA.W tSKiTHtr ftrartaaal kad AiM^plidi Stfwtefol SamI AiMMSNpkvte MHt. life. LU.H Haad Cloaatet urcatbr Nop ToS ^teT^la^* ftW Qoaatof ssfc-i-r LXA-f-lt csr3L 9 s u -c ^mSt * ) "KJaJtFMrr KncMlI Slaad, r^artalV IIadd lag Fnaaaa A,SS^(.y> llrdaaallr Smetana, a t Ota Cate* Bain Catea, TalatetCala* Kapnaad Strwtanl Stood at Nx|dat tlauaaa Faottal arCuMiaaaa Itemaateati Piaak Water Hrbo*** Urmtmroe, 0 g Owl Co m* teptmod tnh.tw*il f<i at JVtiol or Cftt--wi lawrolw 1m tmk WM tHt. 8b tat. 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