Few years back I brewed up a Dremel "backing plate". Used a 1˝" piece of dowel and Dremel's little shaft that has a tapered screw (wood) on the end. Cut a piece of foam polishing pad (the hand type) and put a piece of Velcro on the "plate" and pad.
Did it work? Yea but it needs to come up with some speed so's not to bog down. It worked pretty well on the 'wood' trim (interior) scratches using Plastx. But it is defiantly a two handed operation! Really easy to get the surface way to hot.