I should have noted that the product mentions not to use on painted surfaces and that it may stain certain plastics. I'm not sure what they mean by that because I've been using it on the black parts of the DeLorean for a year with no bad results. It restored the new look to the black bumper sections as well as the black metal trim around the windshield. It contains various polymers and antiozonants and lasts quite a while. Bruce Benson >Miguiars sells a product for > treating tires called Endurance High Gloss. It's a purple grape smelling gel > that works great on the black trim . Like all things in life, moderation is > best. Use it sparingly and it makes the black bumpers and trim look new. > > Bruce Benson >