Why is it bad to clean a coin?

Almost all cleaning methods will change a coins appearance and reduce it’s value. Chemicals and rubbing a coin will remove metal. Coins are struck at high pressure giving the metal a high natural luster, cleaning a coin will impair this luster. Coins can be professionally cleaned and restored both NGC and PCGS offer a service with proprietary methods. Grand Rapids Coins LLC is a licensed deal for both organizations and can submit coins for restoration.

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