It can be done. You will have to use a mixture of 2 and 3" dia. roloc discs, 50 grit and brown scotch brite disc's- 80 grit cartridge rolls - 3/8 " wide belt sander with 80 git belts and scotch brite belts- 3" d/a with 80 grit hook-it discs and some final hand sanding. The key is to use Aluminum Tap Magic cutting fluid. Just a little goes a long way. Cuts down sanding time and build up of material on the discs. It's messy but well worth it.