(Polishing and buffing pipes with "difficult areas")
It is an excellent tool, but, practice and experience give you great results, not the tool itself.
I used the small cotton wheels to buff some of my pipes with Carnuba wax. It worked pretty well. I did it on a low-medium setting. I wouldn't use it on the stem though, I have left a nick or two in some of my stems that I had to spend extra time on getting rid of. I just use a buffing wheel on a drill now, so I recommend that. I got my wheel cheap on Amazon.