I thought about polishing, but I don't think I want to work real hard keeping it shiny.
I painted mine with Duplicolor Aluminum Engine Paint #1615. Looks like the original color from Honda. If you get tired of keeping the polished look, some primer and paint are easy to do later. I clear coated with a Clearcoat. Some of my buddies were surprised that I painted them, they thought I had put new ones on.