For the silver coin -- I'd recommend an acetone bath. Be sure to get pure acetone and not nail polish remover. You can search for "acetone" on this site and get a lot of information.
I've done it. It smells bad so you have to do it outdoors or at least near an open window.
I don't know anything about the method UltraRant described.
I've done it. It smells bad so you have to do it outdoors or at least near an open window.
I don't know anything about the method UltraRant described.



























