I have a set that I coated with a clear acrylic spray over 10 years ago. They are finally a little dull but not pitting. I need to figure out how to get that coating off of them so I can do it again. They are the same ones in the link above. Some of the coating is starting to flake off. I like the aluminum brush look myself. I tried to keep them that way. If I can get this stuff off without effecting the aluminum I will not have to polish them.