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<p>[QUOTE="GDJMSP, post: 29701, member: 112"]Howdy houston_ray - Welcome to the Forum !!</p><p><br /></p><p>The green stuff on your coins is known as verdigris - it is corrosion and it will continue and it does harm your coins. It literally eats away into the surface of the coin.</p><p><br /></p><p>What you do about it depends on how important the coins are to you. There are comercial cleaners that will remove most of the corrosion but at the same time they damage the coin too, in particular copper. The cleaners are acidic and while removing the corrosion they also remove small amounts of metal from the surface of the coin. </p><p><br /></p><p>So you have a decision to make. If the importance of the coins is sentimental more than value - then you have nothing to lose for you will prevent further damage. But at this point any monetary value will have been greatly reduced depending on the amount of corrosion damage to each individual coin.</p><p><br /></p><p>Wish I had better news for you - sorry to say I don't <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 29701, member: 112"]Howdy houston_ray - Welcome to the Forum !! The green stuff on your coins is known as verdigris - it is corrosion and it will continue and it does harm your coins. It literally eats away into the surface of the coin. What you do about it depends on how important the coins are to you. There are comercial cleaners that will remove most of the corrosion but at the same time they damage the coin too, in particular copper. The cleaners are acidic and while removing the corrosion they also remove small amounts of metal from the surface of the coin. So you have a decision to make. If the importance of the coins is sentimental more than value - then you have nothing to lose for you will prevent further damage. But at this point any monetary value will have been greatly reduced depending on the amount of corrosion damage to each individual coin. Wish I had better news for you - sorry to say I don't :([/QUOTE]
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