i have bought Black & decker mouse sander. That helps in getting through the pits... BUT it leaves its own swirly mars.. which need to be hand sanded out. Ive found when polishing pipes, ect, if you cut the sand paper into strips (about 1" wide and as long as possible) you can go around the pipe and pull back n forth... its works well... since it gets boring quickly to hand sand.
you should go to home depot in the tools section they have a buffing kit made for drills, it comes wirth compund and only costs $12.