I use a buffing system in woodworking, tried it on my GC3 rails while the table was disassembled and Craig (N10spool), thought they were new. The system is made by Beall Tools, mine mounts on a lathe. Go through each step using the tripoli, white diamond and carnauba wax.
http://www.bealltool.com/products/buffing/buffer.php
Careful, a machine mounted buffing wheel can surprise you (and me) with how quickly and far it will fling a work piece.