Mineral oil is good to soak coins in I have never used it but only because I don't mess with dirty coins lol. I will usually just run warm water over the coin and then dab it dry DO NOT RUB but if you are holding really dirty coins like coated in mud I would rinse them and if that don't work then soak them. I am not positive on how long to soak them but I would not leave them in it more than 30 days. but I could be wrong on that as I have never done it.
Gary
Gary
















