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<p>[QUOTE=&quot;Just Carl, post: 114419, member: 4552&quot;]Please remember that any type of coin cleaning will help distroy the coin to some extent. You must realize that coin dirt is not always dirt. Much of the stuff you see on coins is a contaminate that is formed from something in the air or where the coins has been. Do you know where your coin has been? To note that the removal of any contaminate on any coin will deminsh the coins value and this partially due to the loss of material from the original coin. For istance a copper coin will first oxidize in normal air. This will form a layer of CuO or CuO2 which will further react with the well known SO or SO2 radical in the air which when combines with H OH (hydrogen hydroxide otherwise known as water) will form a Sulfide type of acid. This reacts with the copper on coins and when removed takes away the metal Cu with it.</p><p>Now if you really want to see a shinny penny, put it in battery acid.[/QUOTE]</p><p><br /></p>

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