First throw the cigarettes in the garbage and you'll shave with it a lot longer and healthier. (running and ducking for cover)

That one looks rough right now. Do a metal polish on a paper towel and see how much improvement that and some elbow grease can give you. If you buff or sand it ... put it in a tumbler, you'll lose the etch. One of those can't have your cake and eat it too situations. I like to leave them as is unless they are really bad.

By 'as is' I mean cleaning as much as I can with metal polish, q-tips and paper towels. A buddy of mine that restores takes 10 hours to sand a razor to ready for the buffers. He does it while watching TV he told me. I don't watch TV and sanding 10 hours ain't my cup of tea. I'll take the patina over that.