I recently purchased a set of vintage Edelbrock cast aluminum finned valve covers. The previous owner had them beautifully media blasted. They look great. However, I know that over time, aluminum tends to discolor. Is there some kind of coating I should put on the covers? I was thinking clear coat, but then they would be glossy. I like the bare cast look. Can anyone suggest something? Can they be powder coated?

Thank You in advance.

Pat

P.S. Boy, us old geezers stick out like a sore thumb. At home on the computer late Saturday night. : )