The first rule of coin collecting is: DO NOT CLEAN YOUR COINS. This is the most important piece of advice for any collector, new or old. Serious collectors and experts agree that most coins should ...

Add Yahoo as a preferred source to see more of our stories on Google. Credit: New Africa/Shutterstock Credit: New Africa/Shutterstock You know those pennies, nickels, dimes, and quarters in your ...

Use less aggressive ways of cleaning old coins – an efficient method is to soak them in vinegar or lemon juice for 10 to 15 minutes, then wipe them with a cotton cloth. This process should remove any ...