Originally posted by elliott If you want to strip it chemically you should remove the mount from the lens. I'm not sure what will remove that particular paint though, I've used alcohol and brake cleaner on metal lens parts before and it never hurt the paint, it seems like tough stuff.
You will normally have more to remove than just some 'paint' and thus, chemistry alone won't do the job.
The anodized layer is basically solid aluminium oxide firmly bound to the metallic aluminium. The black dye is just a cosmetic add on. You can find a diagram of the structure here:
https://www.pentaxforums.com/forums/120-general-technical-troubleshooting/206...ml#post2586831
Do note, that anodized aluminium does not have to be black. I have a set of Soligor P/K extension tubes that look deceptively 'metallic' because they have not been dyed, but they have been oxidized anyway and needed the same type of treatment.
My vintage Soligor K-Mount Extension Tubes. The K-mounts may look metallic and electrically conductive - but they ain't.
Last edited by Stone G.; 11-21-2013 at 03:26 AM.
Reason: picture added