[Diehard]

If you have black paint with swirl marks or any little scratches try the black box from Turtle Wax.
It comes in a black box (duh) and you get a bottle of pre-wax cleaner, a bottle of black carnuba wax and 2 bottles of black detailer along with 2 applicators.

It's a little labor intensive as it's a 4 step process, but it works great!!
Deep shine and no more swirls or scratches.