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Old 08-31-2009
SiXeVeN SiXeVeN is offline
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Aluminum painting issues.

Ok, so I am painting some aluminum hardware. I know to acid etch and have zinc chromate primed the metal. The issue is that the zinc chromate is like teflon or something The chromate is bonded solid to the aluminum but unless I want baby poo green colored hardware, I can't get any topcoat to bond.

Any paint that I coat over the chromate barely sticks. I can peel it off with a fingernail! What is the secret? If I heavy sand the primer for more bite, I end up cutting through the primer. Can you use a traditional primer on top of the zinc chromate? Then use your top coat on top of that?

Help would be greatly appreciated.

I haven't tried a two part polyurethane paint yet...maybe that is the trick but I don't want to spend the big $$$ on the paint and have it still not stick.
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