I've used my Porter-Cable with mixed results in the past for polishing my rear window. Impossible to reach the corners on the inside. I picked up a "Power Ball" recently and was wondering how this would work with some plastic polish. I think getting into the corners with this won't be much of a problem.

 

My window is glass, but I recently purchased a Powerball. I used it to apply Wheel Wax to my wheels. It worked very well. However, I cleaned it along with my foam polishing pads and it is taking forever to dry. It may have something to do with the cold weather though.

 

just for some clarification, in case someone does not know what a powerball is:

http://www.superiorcarcare.net/mo5140.html