How do you clean copper pennies?

There are many ways to clean a copper penny, but one method is to scrub it with ketchup, rinse the penny with water, and buff it with a paste of baking soda and water. Wipe any remaining paste away with a soft cloth.

1. Gather the materials

   Get a bottle of ketchup, baking soda, a toothbrush, a small bowl and a dirty penny.

2. Apply the ketchup

   Rub a small dab of ketchup on both sides of the penny. Lightly scrub it into the penny with the toothbrush.

3. Rinse the penny

   Rinse the ketchup off the penny with running water.

4. Make and apply the paste

   Pour baking soda into the bowl. Add enough water to make a thick paste. Rub it into the penny with your fingers.

5. Remove excess paste

   If any paste is left on the penny, gently remove it with a soft cloth.