careful if its car plan t-cut colour fast black
while it may make it look good in the short term it will have stripped a thin but significant layer of paint/laquer to remove the swirls,
far better to use SRP which uses the most delicate of abrasives and fillers, it will preserve the paint work long into the cars life.
several passes of SRP can be used (but takes time), it may still show some swirls but better to live with that and know there is still the original laquer/paint left on the car with swirls.
I followed an almost new Black Jaguar XK a few days ago and when the direct sunlight hit the rear from certain angles the paint work lit up with swirls marks. Made me feel much more relaxed:
black cars + direct sun + clean = swirl marks
The wax acts as a lens.
Has anyone with a black car tried autoglym UDS yet?