Oh, I finished the chainring. At first I didn't know what you were talking about! I'm standing on a tan throw rug on the floor. It's reflecting on it toward the bottom. As far as removing the rust from the paint, I didn't "remove" the rust but just polished it down. If you look at the bike in person it's very shiny but there are dark spots in the finish. That's where the rust is/was. I used polished compound and my arm muscles to get it where it is.