I've been using a Lead Away cloth on cylinder FACES of stainless revolvers, and inside the frame window as necessary since 1979, and on FA revolvers since my first one in 1990. I don't get carried away with it, like trying for complete removal, and NEVER use it inside chamber mouths, since it is abrasive and will remove metal. Don't use anything other than your hand to drive the cloth - no drills, for example. Don't use these cloths on blued guns, as they will remove blueing.
Be careful and sensible, and it works safely and fine.