Just to add a bit info, I also use Swirl for soft paints--Infiniti, BMW, MINI, Porsche, and harder paints like Corvettes. Its very versatile.
Also, don't want to go off topic, but I'm also evaluating a new system called Gloss It right now which best feature seems to be its very long play time, thus the ability to polish a panel for a very long time getting better results the longer you polish, and a little goes a long way. My preliminary tests show that it polishes as well and cleanly as Prima, but seems to have a bit more gloss on paints that might otherwise be a bit hazy on that first polishing pass. No conclusions at this time though.