There's a guy in SLC using it on planes. He washes them and details them for people. He also uses it on his DD and man is it a sweet looking factory paint job. It is a black Benz.
I would use it on a DD if you,
1 - used a duster and made sure the car was pretty clean first.
2 - only clean in the direction of the body lines, never in circles! Resist wax on wax off type of movements.
Mel