A quick fix is white out. Remember the typewriter correction fluid. The small bottle with the little brush in the bottle. When you want it off, it scratches right off. The other way it so drill it on the back side and paint the dimple.

I even went to a craft store, bought a small set of artist brushes, and then 14 florescent paint colors. So depending on my mood, I have have any color I like. I liked the lime green and the white.

A friend I knew took his off and replaced it with a solid silver dime. It looked cool but he never could shoot worth a hoot anyway.