Not Ranked
I agree with Bob that powder coating is the way to go. There are 2 types of Anodizing for Alum. 1. Hard Anodizing is a very hard coating that is that actualy builds thickness of .002 at a min. The Problem is that is does not dye well. 2. Sulfuric Anodizing take color well but is not very durable because the coating adds just .0002 of thickness.
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