had this soaking in cold peroxide since saturday taking it out periodically to pick at it with a metal nut pick.this was some stubborn verdigris and took hours of surgically picking away at the crustiness with a jewlers loop jammed in my eye socket.the thin layer on reverse doesn't wanna let go so,i'm going to leave it.kinda looks cool making the date and lettering stand out.
before,during and after photos