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