Did a search on YouTube on cleaning coins. It is a wonder there are any good coins left. My favorite method was putting coin in vinegar and rubbing salt on the surface. A must see is the video of hitler ordering a 25 th anniversary set. Do a search on YouTube. Lack
Wow, I don't know about rubbing salt on the surface of a coin, but salt mixed into vinegar will work great for copper.
You should see the one with putting toothpaste on it and then rub it with an "eraser" and clean it with a piece of t-shirt.....lol This clowns are out there.
