I have been 3M's polishing system with a PC and it does get to the level of shine that I like. I have been using NXT topped with S100 but I am not thrilled with the longevity (4 weeks!?). I would like to try some new products just for something different. Any recommendations? The car is a 1998 Jaguar XJR in obsidian black...basically black with very fine gold pearl in it. Thanks!