" Working together we can be Far bigger Idiots than any of us could be alone." Like that saying Black 03 Z06. I have owned a few black cars in my time, and found them hard to keep up to par like other colours. I tend to agree with JCWP suggestion, hiring a Detailer. They have all the right stuff and probably have had experience riding the condition you currently are having. Good luck and Happy Motoring.