Static you must like burning paint beacause if you use a 7500 rpm buffer thats exactly what your going to do. The recommeded buffer speed for buffing clearcoat painted metal surfaces is 1700-1800 rpm. The speed for buffing the plastic bumpers should be 1200-1250 rpm this is due mainly because of the softness of the paint on the bumpers due to the flex agent added to the paint to allow the bumper to flewx without cracking the paint. I use buffers on cars pretty much every day and I would suggest getting a variable speed one so you can adjust the rpms. I personally use a milwakee model buffer and its rpms range from 0-3800 rpm and I have yet to have used it going full blast with the thing.

'98 Mystique Sport Zetec ATX CTA intake, 2 1/2" cat back exhaust with magnaflow muffler, diablo sport chip, suspension mods and wheels in spring