Month: February 2013

Cleaning Old Coins

Old coins often have dirt, corrosion, oil, or other “gunk” on them. It can be tempting to clean them with powerful industrial cleaners, silver polish, Shine Brite, or other chemical cleaners. However, this is a bad idea. Over time, coins develop oxidation, discoloration, and a layer of grime. This is called a patina, or more