These headlights were so yellow when I got them that you couldn't even see through to the inner lens. I wet sanded with 1500 and 2000 grit sand paper. I then outlined the edge in black automotive paint and then covered the whole light in a clear. It's been over a year of Texas sun beating down on them and they still look new. I've done a lot of modifications to my box, and outlining the headlights is one of my favorites.