I have a Camaro with white wheels. It's the 30th anniv. edition and it came with them, not my choice. The problem is that there are alot of little dark spots all over the wheel. I assume it is brake debris that has bonded to the rim. My question is how can it be removed? I have tried clay, DACP, brake fluid, gasoline, even tried heating it up but no success. I can scrape some of the bigger spots off with my nail once in awhile, but there are too many to keep doing that. Any help is greatly appreciated.