A: These are made of aluminum so I would suggest you consider having the anodized or powder coated.
Anodizing is a simple electrochemical process developed more than 75 years ago that forms a protective coating of aluminum oxide on the surface of the aluminum. The lifetime of the finish is proportional to the thickness of the anodic coating applied.*
Powder coated aluminum involves the process of applying dry paint to an aluminum product by way of electrostatically charged paint particles. Our exclusive aluminum coating technology allows for detailed, vivid shapes and patterns.**
Is there a follow up question that we can perhaps attempt to answer? We take deep pride in our technical expertise, as we know it separates us from our competition, so don't hesitate to ask.
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*from: http://www.saf.com/how-to-specify/how-to-decide-between-anodizing-painting-and-powder-coating/
**from: http://www.decorapowdercoatings.com/site/articles/2013/08/09/sample-blog-post---delete-me