1. Find out the process of what your detailer is doing. Polish, pad, machine, etc. As someone may have suggested, the swirls may have never been completely corrected.

2. What wash mitt are you using? Foam, cotton, microfiber, synthetic wool, natural wool? These can play a role. We only use natural australian sheepskin on all our cars.

3. What are you drying with? Bath towel, synthetic chamois, natural chamois, microfiber towels, etc. Only high quality microfiber towels should be used or forced air would be the most ideal method as you don't come into contact with the paint.

4. How are you washing the car? Do you rinse your mitt after each panel? Do you work from top to bottom? Do you rinse each panel after every pass?

5. Do you use deionized water? This helps tremendously as DI water is pure and it won't leave water spotting to chase and rub. Also, the water has no impurities so your soap is more effective at cleaning.

Send me some pictures and I can better assess your paint and point you in the right direction. Cleaning a black car isn't any more difficult than a white car if you're doing the right technique and using the right products. It's a little harder, but not much.