Quote Originally Posted by EnJoY View Post
Brake cleaner is powerful stuff. For anyone who tries this, be sure not to get any on the rubber o-rings or any rubber seals. It's only safe on metals and strong plastics, such as Delrin.
am using brake cleaner now... should also mention that ... good room ventilation is needed...

just kidding.. but here is the technique: spray some Brake Cleaner on cloth, and then wipe the Delrin the surface...