How To Clean CoinsBy Kenneth R. Rohn
From page 16 of the May, 1997 issue of Lost Treasure
Copyright © May, 1997 Lost Treasure, Inc. all rights reserved
So you've recovered a jar full of coins during the course of the season, but they look like they've been through the Boer War. They're filthy dirty and encrusted with years of accumulated grime.
The bank where I do business will not accept dirty or discolored coins. It really isn't them, so much as their customers, who expect and demand shiny clean coins distributed from their bank.