Cleaning coins is the process of removing dirt, tarnish, and other unwanted materials from the surface of a coin. This can be done for a variety of reasons, including to improve the appearance of the coin, to protect it from further damage, or to prepare it for sale or display.
There are a number of different methods that can be used to clean coins, depending on the type of metal that the coin is made of and the severity of the dirt or tarnish. Some of the most common methods include: