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Right way to paint aluminium

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Abomination:
I had a plate of aluminium diamond plate made as a kick panel for the bottom of my cabinet but I want it black.  I bought this black appliance enamel, according to the can its for smooth metal and supposedly the same stuff on your fridge ect..  But it chips easily.  anyone know the right way to paint this and make it stick, Its a kick plate so it will take some damage over time.

Or should I just bite the bullet and go get this sucker powder coated?

AceTKK:
annodizing or powder coating is probably your best bet.  If you want to go the paint route try some automotive type paint.

-Ace-

Ken Layton:
Aluminum needs Zinc Chromate (greenish colored) primer. This primer actually binds to the aluminum. Your best bet may be to go with powder coating.

TOK:
Might be a good idea to rough up with real find sandpaper before shooting the primer too. I've seen a lot of diamond plate that has a clear coat over it to keep the aluminum from tarnishing.

MajorHavoc:
Fwiw, you'd probably be better off grit blasting the diamond plate as opposed to sanding.  Clean, clean, clean, rinse with clean water, etch with alumiprep or equivalent, rinse again, apply zinc chromate then your topcoat preferably a 2 part polyurethane paint.  Hmmmmm, in retrospect, powdercoat is looking more and more appealing.

Seriously, unless you have access to the necessary chemistry and safety gear you would be better off with the powdercoat. 

Good luck
Mike

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