Have you ever noticed a greenish tint to your coins and wondered what it is? It is PVC, an additive used to make plastic more pliable. Although this additive enhances plastic’s capabilities, it poisons coins and corrodes the metal.

These Indian Head coins are beyond repair.  However, many are easily repairable and often, you can use acetone to clean minimally damaged coins. Over-cleaning the coins may further damage them so it is wise to do so in moderation. Luckily, Handini7  provides a few possible solutions and provides a helpful step-by-step video via YouTube.

via Some PVC coins can be cleaned | Proxiblogs Top Online Coin Auctions.