My first post, but I have always had a hard time with plastic trim going chalky and fading on me. I have found just applying back to black works well on a clean and lightly faded plastic trim but for the stuff with oxidation I have found that when I wash the car a 3m pad (scrubby side of a kitchen sponge) will get the oxidation off (don't have to go overboard with the pressure) and when it dries just use your favorite product (back to black, etc..) My dad is a marine (ie nautical, not military) guy and swears by formula 303 for vinyl on plastic and rubber. The canopy on his boat still beads water after a year and looks great. I use it on the interior of my cars and it seems to work well, and it has the added benefit of uv protection. I just got an 06 kj and the rear bumper has a lot of oxidation (easily scrapes off with my fingernail) so I will post some before/after when I get around to it this weekend.