Using an UltraSonic Cleaner on Coins and Metal Detecting Finds – American Coin Stash

An ultrasonic cleaner is a really nifty little device that removes dirt and debris by agitating fluid using 20-40kHz sound waves. It can be used on coins, jewelry, (some) glasses, and tools. I do not advocate for cleaning valuable coins in an ultrasonic cleaner. Exposing the coin to water and even gentle vibrations can damage…

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