But, make sure to progressively end up at 1500. Don't skip a grit either or you'll work yourself to death. I personally get a lot of the surface down with a drill and then resort to hand from then on. For those of you who can get the GOOD brake cleaners spray them on painted parts to remove paint with ease - be very careful with it. Wear a mask and eye protection.
Gloves help too.
It might be wise to spill some in the right places. Rubber abrasives are going to save you time smoothing the cylinder once the surface has had most of the sharp edges removed. Jewelers rouge is a cutting tool to aid in the removal of metal without leaving too many marks. Some hardware stores have big chunks of the stuff real cheap. Again a light touch and keep the tool moving.