One dirty old penny before

Pour salt and vinegar into a small bowl

Stir the ingredients until the salt is dissolved

Place in the penny and watch it become new again.

The penny after about a minute of sitting in the mixture

Place baking soda in a bowl and slowly add water to make a thick paste

Use your finger to put the second mixture on the penny

Cover completely

Rub the second mixture off then rinse and dry the penny, and it should look shiny and new!