I have heard it referred to the "Green Cancer". My question is simple: How is it cured? I am cleaning the bridges of a project pocket watch and wonder the best way to remove it . Do I polish it off, or scrap it, re-guild it, or just leave it be and never open the watch to show off the movement? Remember I am a beginner with watches and DO appreciate everyone's wise counsel. How do you do it? How should I bring beauty back to these bridges?