Don't know about any books specifically addressing metal polishing, however Trinidad (TSJC) offers summer gunsmithing seminars on this subject and others such as engraving and checkering. If you can't attend, it might be possible to obtain some instruction info from either the school or the individual instructor.
One of the TSJC summer seminar metalwork instructors is a poster on this forum, if he sees this post then I hope he'll chime in with better suggestions.
Regards, Joe
PS: Brownell's Gunsmith Kinks books are a great source of suggestions for different metal treatments and how to get them. Joe
Last edited by J.D.Steele; 07/12/10 09:45 AM.