Tips for Cleaning Old Coins

Cleaning old coins should be more for protecting the coin rather than cleaning it, according to the Collect U. S. Coins website. If leaving dirt or any other corrosive material will cause damage, clean your coin with the most gentle technique. Some techniques work better on silver coins while others clean copper coins best. Knowing how to clean your coins will help you keep them in the best possible shape for years to come. Don’t attempt to clean any old coins you believe to be valuable. Any damage caused by solvents or wear could reduce their value.

Wash your hands before handling coins. In addition, place your coins on a clean surface, suggests website Collect U. S. Coins.

Use dishwashing detergent. Soak coins in a gentle dishwashing detergent to remove dirt. If this doesn’t remove the dirt, place a small amount of detergent on one side of the coin and rub between your thumb and finger.  

Try using baking soda. This method is popular but it does not work on all materials. Baking soda works best on cleaning old silver coins found on the ground. Wet the coin, dip it in baking soda and scrub it with an old toothbrush. This will shine the coin without scratching it.

Use white vinegar. White vinegar works well on pennies. Place a few teaspoons of vinegar in about one cup of water in a plastic container with a lid. Secure lid, shake well and let the coin sit in the mixture overnight.

Try lemon juice for removing oily marks on coins.

After washing, allow your coins to air dry. You can also use a blow dryer on the lowest setting. If you must dry them with a cloth, make sure the cloth is soft cotton.

Consult with a professional before attempting to use tarmish remover as this could devalue your coin.

Use electrolysis kits carefully, as they can cause irreparable damage.