Today I used a claybar on my black Cobra (which I bought used and this is the first time I've detailed it). I can not believe the results! The claybar removed all of the surface garbage that is usually so hard to get rid of. I then put on a coat of Meguiars 7, followed by 26- both which I have used before, and WOW- it looks like a new car. Just thought I'd share- it really works well on a black car. Oh, and the Porter Cable Polisher is worth the $- it makes a huge difference and makes it very hard for you to damage your paint. I'll post some pics tomorrow.