What primer I shoud use on aluminium parts/chassi?

Joined
29 October 2007
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Somebody knows what type of primer I shoud use on the aluminium before I spray the paint? Or what do you use on the bare alu before painting it?
 
Self-Etching Primer. If you're using spray cans, I like Duplicolor brand. It's an olive green color and provides good coverage and "bites" into the bare metal so it doesn't peel or flake off.
 
I will say that we use alodine, at work, to etch the aluminum. It transforms the outer layer of the aluminum into a very protective surface. After that we use an epoxy primer to seal the surface. You can buy self etching epoxy from a paint store. Make sure you prep the surface very well before you spray.
 
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