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<p>[QUOTE=&quot;coin_nut, post: 2781543, member: 80148&quot;]Wow, lot of big words being tossed around. If my coin has mud on it and I rinse it off in clean water, maybe use a soft toothbrush carefully, then I have &quot;cleaned&quot; it causing no visible damage. I understand &#039;dipping&#039; a coin in acetone is OK, depending on the material of the coin. Of course any abrasive or chemical action such as wire brush, tumbling in grit media, tooth paste, silver polish, brasso.....will alter the surface of the coin and render it &quot;cleaned&quot; and therefore deplorable to all of us astute numismatists. </p><p><br /></p><p>So with all my rambling I have not come up with what was originally requested: a concise definition of cleaning as applies to coins. I merely added to the entropy of the coin universe.[/QUOTE]</p><p><br /></p>

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