I just applied some stuff that I think is called "Black" to the rear fender, which was really turning gray. So far, so good. But it hasn't been long. I wish now that I had taken a before pic. I'll post some, and see if any of my existing pics don't show the grey as it was. The stuff I got comes in a matte, gloss, etc. I think I got matte, since the only black plastics I care about have a matte finish.