I tried the bondo stuff a while back and it never looked right. My car is black, so the shade was always just off. It worked great on another car I had with a more rubberized window trim. I ended up using a 3M vinyl which matches the original trim very, very well. It's thicker than a lot of other vinyls and the shade and gloss are very close to the original pieces. The material is marketed to black out chrome trim so I figured it would work for this. Someday I'll get them painted, but this works for now.