I've tried the PC and it seems to work very well. It has been claimed that the dual action type of polishers like PC can't harm paint, but I think it depends on the product being applied and the presure being applied by the operator. Products with harsh abbrasives could quickly cloud or dull clear coat.
The Porter Cable 7336sp is on sale even as we speak at:
http://www.internationaltool.com
$109.95 less a $10.00 instant rebate making it 99.95 with free shipping!
That's the best price we've found, mine came Friday. The PC kit from CMA supplies a velcro head and pads,ect for a good price. CMA is at:
http://www.properautocare.com they are great to deal with.
Well, there's my two cents for what's its worth.
Bill :) :)