Brodhead Pietenpol Association

Original Posted By:> John Fay
I paint my metal parts with Zinc Chromate when they are constructed, toprotect them until ready for installation. After final fit and just beforeinstallation, I paint them with the final color coat. I've never had anytrouble with this procedure through two Piper J-5 restorations. Phil

Original Posted By: Warren Shoun
Subject: Pietenpol-List: Priming metal parts?>>>We just ordered all the steel plate we need to make the>various fittings and control pieces. I have never worked>with steel before. When I finish making a part, shouldn't>it be primed immediately before being stored away? With>what? I know that I can get spray cans of zinc chromate>primer, but I thought I read someplace that won't work>anymore because many of the paints and other chemicals>used in the covering processes now will break it down>just like paint removers. Can anyone clear this up for me?>>Thanks.>>John in Peoria>>________________________________________________________________________________

Original Posted By: Phil Phillips
We just ordered all the steel plate we need to make thevarious fittings and control pieces. I have never workedwith steel before. When I finish making a part, shouldn'tit be primed immediately before being stored away? Withwhat? I know that I can get spray cans of zinc chromateprimer, but I thought I read someplace that won't workanymore because many of the paints and other chemicalsused in the covering processes now will break it downjust like paint removers. Can anyone clear this up for me?Thanks.John in Peoria________________________________________________________________________________

Original Posted By: John Fay
Sir; I suggest that you don't use the old Zinc Chromate primers. Use the new twopart epoxy primers and paints, almost bullet proof or you could have thempowder coated ($). Z Chromeate does negatively react with a lot of coveringprocesses. The two parts don't. In the meantime, until you have intstalledthem for fit with the other parts, just coat them in light oil or the like.This way you can dip them in solvent which removes the oil or preservative,fiddle the fit to the other parts or whatever then just re-oil them and putthem in zip lock sandwhich bags. No mess, no rust. When all the "fiddeling"is done and you are ready for final installation, then get them finalpainted or coated. My first plane was done the "old" way, IE; Z Chromate andenamel finish. After the fittings were installed, most of them were chipped,nicked or showed signs of rust on the edges. The two part paints andespecially powder coating did away with that. It is dissapointing how muchpaint gets removed or scuffed at final assembly from wrenches, sockets anddrift pins...!Earl Myers-----Original Message-----

Original Posted By:> John Fay
The powder coating thing is now available for us home tinkerers. Go tohttp://www.eastwoodco.comand check out their $149.00 kit. Have done some practice pieces for myself andthey turned out really great.W-----Earl Myers wrote:> Sir;> I suggest that you don't use the old Zinc Chromate primers. Use the new two> part epoxy primers and paints, almost bullet proof or you could have them> powder coated ($). Z Chromeate does negatively react with a lot of covering> processes. The two parts don't. In the meantime, until you have intstalled> them for fit with the other parts, just coat them in light oil or the like.> This way you can dip them in solvent which removes the oil or preservative,> fiddle the fit to the other parts or whatever then just re-oil them and put> them in zip lock sandwhich bags. No mess, no rust. When all the "fiddeling"> is done and you are ready for final installation, then get them final> painted or coated. My first plane was done the "old" way, IE; Z Chromate and> enamel finish. After the fittings were installed, most of them were chipped,> nicked or showed signs of rust on the edges. The two part paints and> especially powder coating did away with that. It is dissapointing how much> paint gets removed or scuffed at final assembly from wrenches, sockets and> drift pins...!> Earl Myers> -----Original Message-----

Original Posted By:> John Fay
Powder coating is the way to go. I'm using it on my metal pieces.Application is easy and cheap.On the BPA website there is an article written by Chris Bobka about powdercoating.Mr. Bobka will also give a powder coating seminar at Btodhead this year.Greg Cardinal>>> Warren Shoun 04/11 11:23 AM >>> The powder coating thing is now available for us home tinkerers. Gotohttp://www.eastwoodco.comand check out their $149.00 kit. Have done some practice pieces formyself andthey turned out really great.W-----Earl Myers wrote:> Sir;> I suggest that you don't use the old Zinc Chromate primers. Use the newtwo> part epoxy primers and paints, almost bullet proof or you could havethem> powder coated ($). Z Chromeate does negatively react with a lot ofcovering> processes. The two parts don't. In the meantime, until you haveintstalled> them for fit with the other parts, just coat them in light oil or thelike.> This way you can dip them in solvent which removes the oil or preservativ=e,> fiddle the fit to the other parts or whatever then just re-oil them andput> them in zip lock sandwhich bags. No mess, no rust. When all the"fiddeling"> is done and you are ready for final installation, then get them final> painted or coated. My first plane was done the "old" way, IE; Z Chromateand> enamel finish. After the fittings were installed, most of them werechipped,> nicked or showed signs of rust on the edges. The two part paints and> especially powder coating did away with that. It is dissapointing howmuch> paint gets removed or scuffed at final assembly from wrenches, socketsand> drift pins...!> Earl Myers> -----Original Message-----

Original Posted By: Alan Laudani
It took a few minutes, but I found it. In here he talksabout the rig from Clint's outfit, The Eastwood co.Sounds pretty good to me.http://members.aol.com/bpabpabpa/powder ... __________

Original Posted By:> > John Fay
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Original Posted By:>> John Fay
Subject: Pietenpol-List: Re: Priming metal parts?>We attended an excellent seminar put on by Poly-Fiber at Osh Kosh lastyear.>The concern is that the adhesives and dopes used in the Poly-Fiber (andsome other)>processes contains Methyl-Ethyl Ketone (MEK) which can dissolve ZincChromate>Primer. The solution is to always use a TWO PART epoxy primer on anysurface>that will be in contact with the fabric.>>If you'll be at Osh Kosh this year, I 'd highly recommend attending as manyof>the seminars and workshops as you can; I really learned a lot.>>> Date: Sun, 11 Apr 1999 06:26:33 -0700 (PDT)

Original Posted By:> John Fay
We attended an excellent seminar put on by Poly-Fiber at Osh Kosh last year.The concern is that the adhesives and dopes used in the Poly-Fiber (and some other)processes contains Methyl-Ethyl Ketone (MEK) which can dissolve Zinc ChromatePrimer. The solution is to always use a TWO PART epoxy primer on any surfacethat will be in contact with the fabric. If you'll be at Osh Kosh this year, I 'd highly recommend attending as many ofthe seminars and workshops as you can; I really learned a lot.> Date: Sun, 11 Apr 1999 06:26:33 -0700 (PDT)

Original Posted By: William C. Beerman
Piet gang; ...this is, in detail, what I was generally saying about using Chromatewith certain coverings. I use Stits or Poly Fiber on everything now and it'scomponents will dissolve Chromate and what a mess it is. These days whenthinking about coverings, you have to think ahead to make sure everything iscompatable starting with the varnish and metal primers. I had to revarnishthe allready varnished areas (urethane spar varnish) with the two partStits varnish wherever the glu/fabric was going to come in contact with theairframe..........I tried to save $ here by just treating the "touched"areas with either of the two-parts....Bottom line, use two parts varnish andprimers if you use Stits but best off all, buy their instruction manual, thenew one, it makes covering A-Z very easy to understand.Earl-----Original Message-----

Original Posted By: Earl Myers
John- I just got back from Sun 'N Fun, where I spoke with the Poly Fiberpeople about this very question. They told me to go ahead and use zincchromate primer on the metal parts. When it comes time to paint, assumingyou are using their Poly Tone paints, spray an epoxy primer right over thezinc primer. While the epoxy is still tacky, put a light coat of Poly Tonepaint on the part. The paint and epoxy mix somewhat, and gives the finalfinish coat a chemically compatible base to link to.Al Swansonswans071(at)tc.umn.edu>>>We just ordered all the steel plate we need to make the>various fittings and control pieces. I have never worked>with steel before. When I finish making a part, shouldn't>it be primed immediately before being stored away? With>what? I know that I can get spray cans of zinc chromate>primer, but I thought I read someplace that won't work>anymore because many of the paints and other chemicals>used in the covering processes now will break it down>just like paint removers. Can anyone clear this up for me?>>Thanks.>>John in Peoria>>________________________________________________________________________________

Original Posted By: Greg Cardinal
> Subject: Priming metal parts?>> >> >> >We just ordered all the steel plate we need to make the> >various fittings and control pieces. I have never worked> >with steel before. When I finish making a part, shouldn't> >it be primed immediately before being stored away? With> >what? I know that I can get spray cans of zinc chromate> >primer, but I thought I read someplace that won't work> >anymore because many of the paints and other chemicals> >used in the covering processes now will break it down> >just like paint removers. Can anyone clear this up for me?> >> >Thanks.> >> >John in Peoria> >> >> >________________________________________________________________________________

Original Posted By: Bill Talbert
> Subject: Priming metal parts?>> >> >> >We just ordered all the steel plate we need to make the> >various fittings and control pieces. I have never worked> >with steel before. When I finish making a part, shouldn't> >it be primed immediately before being stored away? With> >what? I know that I can get spray cans of zinc chromate> >primer, but I thought I read someplace that won't work> >anymore because many of the paints and other chemicals> >used in the covering processes now will break it down> >just like paint removers. Can anyone clear this up for me?> >> >Thanks.> >> >John in Peoria> >> >> >________________________________________________________________________________