I use a Roto Zip with a flexible shaft extension. Very controllable as it is electric so you can vary speed consistantly. Big improvement over Dremel. Still need a lot of mano y mano, though. For polishing I use various grades steel wool and I have a small diameter shaft with a slot in the end like a sewing needle. I stick the end of a piece of sandpaper in the slot and wrap it around the shaft. It flaps and adjusts to the shape I'm working.