Black & Decker Mouse detail sander in constant motion with 180 grit finished by automotive wet/dry 600 grit hand sanded. In case anyone is wondering, I left the front sight in to polish the sides on purpose to match the stainless barrel from a side view as an experiment as I usually have the Mepros on. I still need to do some minor detailing of the barrel nearest the frame.
But man, is it a wholesale improvement or what?