If you have an
electrolysis kit, this solution can be used to repatinate a coin. Using this solution,
reverse the usual arrangement--i.e. put the coin on the anode rather than the usual stainless steel spoon or whatever, put the spoon on the cathode, zap for brief periods (seconds) and inspect each time until you like the result ( if you are using an alligator clip, you should move its grip on the coin or you will leave a shiny spot).
I only did this once as an experiment as I don't like the idea of repatinating coins. But it works.
Dan
