I've got a black 07 Porsche 911. I've got a rotary and a pc. I've got some light swirling that I'd like to get rid of. I've only done 3 cars with the rotary but they turned out good. SHould I use the rotary or stick with pc? Obviously I'd worry about burning the paint. I've never really had great success with the pc and removing swirls. I'm using Menzerna polishes.