Chris:
For flat parts, I have some oil based diamond polishing paste in various grits (measured in microns). I have several pieces of cork allocated to various grits and I just grab a legal pad, apply the paste, and start twisting back and forth. For flat screws, I’ve simply been holding them in a pin vice and doing pretty much the same thing. For American screws, I been attempting to follow Stephen Pahlow’s method.
https://www.youtube.com/watch?v=nYamLPIrvr8
For pivots, I use the Jacot (no paste only burnishers) and for gears I just hand polish them using the fingers and the paste. Additionally, I’m working on a scheme for doing snailing as well – not there yet. I have 8MM collets down to #2 so I could probably get by with using those as you say.
Later,
Tom