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Old May 20th, 2011, 09:09 PM   #1
okyredneck
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Default Painting Galvanized Steel???
Re:: Is there a home-based method?   

I am considering a galvanized steel trailer box purchase from Harbor Freight to use on the FlatBug as a future bed when it becomes an RPU.
I have researched and popular opinion says that short of an acid dip bath there is no way to get paint to stick to it.
I would like to know if there are any somewhat economical methods that I can do at home? Or maybe having it sand-blasted? Perhaps a special primer?
Any secret tips out there? Inquiring minds want/need to know??

The FlatBug build:
http://www.volksrods.com/forum/showthread.php?t=33175
Yes, finally some significant progress(I think).
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Old May 21st, 2011, 01:04 AM   #2
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Default Re: Painting Galvanized Steel???

If you can find it, twin etching primer. Comes in a dull mustard yellow or a faded pea soup green.
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Old May 21st, 2011, 04:52 AM   #3
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Default Re: Painting Galvanized Steel???

I used this stuff a couple of years ago on fence posts that were galvanized: Plasti-Kote 21850G Galvanized Metal Primer. Painted 12 posts after using a self etch prep like prepsol, Urthaned them in black base coat/clear coat, it is still holding up with no chips, flaking etc. The other thing I remember is it depends on how old the galvanize is, the older it is the harder it is to have primer/paint to stick.
A friend near by has a galvanized trailer and he used POR-15 primer then POR-15 high UV finish, it appears to be holding up as well.
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Old May 21st, 2011, 05:43 AM   #4
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Default Re: Painting Galvanized Steel???

Wipe the entire surface with MEK or Acetone. Once you break the Galvanizing coating your paint will stick!

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Old May 21st, 2011, 09:00 AM   #5
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Default Re: Painting Galvanized Steel???

spray it down with lemon juice,rince with clear water and then paint W/ rustoleium. it will stick, look good & be cheap
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Old May 21st, 2011, 01:02 PM   #6
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Default Re: Painting Galvanized Steel???

Thanks for all the really great info & tips y'all, but it looks to be a moot issue for me. Can't find the box kit on the Harbor-Freight site now. Originally seen approx. 4/6 months ago. Must have been dropped.
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Old May 22nd, 2011, 05:58 PM   #7
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Default Re: Painting Galvanized Steel???

vinegar
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Old May 22nd, 2011, 06:34 PM   #8
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Default Re: Painting Galvanized Steel???

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vinegar
x2
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Old May 23rd, 2011, 06:27 AM   #9
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Default Re: Painting Galvanized Steel???

x3 vinegar.
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Old May 26th, 2011, 06:02 AM   #10
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Default Re: Painting Galvanized Steel???

x4 on the vinegar. The sheet metal I used in my engine bay, radiator area, and my trans / driveshaft tunnel is made out of galv. steel. No problems with paint sticking whatsoever.
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