If d156/ultimate quik wax is used weekly from the time you bought the car, Eldorado2k is right, it's all you need. If not, like he mentioned clean it all thoroughly with meguiars d101 APC or D108 Super Degreaser diluted 10:1. You can scrub it with either a soft bristled brush or a cheap microfiber towel. If you haven't cleaned black rubber trim before don't be alarmed by all of the black transfer. That oxidized rubber cannot be brought back to life no matter what a company claims their "dressings" or "protectants" can do to the rubber. Even Solution Finish requires the rubber to be thoroughly cleaned first. Once it's been cleaned with apc, I typically use Opti-seal, carpro reload, optimum car wax, or Meguiar's ultimate liquid wax would be the best consumer option to apply to the rubber. It makes the rubber look darker but maintains the deep rich stock look that most people strive for. The best part about using a non-staining sealant or wax is that it isn't greasy, is dry to the touch, and beads/sheets water like it does on your paint. If your rubber is still in bad shape before applying one of these products it may be necessary to use a product like optimum poli-seal which has extremely fine abrasives that will actually polish the rubber and can do an incredible job restoring the most neglected rubber or smooth plastic trim. (For textured plastic, you don't want to use any product with abrasives & I find it easier to stick with a spray sealant like reload, opti-seal, d156, etc. Best of luck to you in your rubber restoring endeavors! Update us with what you decide to use and how it worked for you!
