One of the thrift stores I work in got in a 60'/70's (Maybe 50's era??) wind up Helbros (Attached pic isn't the actual watch but the exact model).
Anyway, the back, except for the cover, is covered in a greenish gunk; around the cover, the lugs, etc.
Whats the safest way to clean this, and what would I use to clean it with?
Maybe I should post before/after pics?