pipemakersforum.com

Fellow on another site clued me in on a company that specializes in polishing --- mostly metals, but they also do other materials . . . like wood and plastics. You might be interested in this:
http://www.caswellplating.com/buffs/wood_pol.html
Pricey for me, but maybe not for someone else.

Aw, c'mon, guys. 1100 rpm, twelve-inch wheels? I think it'd be a GREAT buffer!