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<p>[QUOTE=&quot;GDJMSP, post: 518708, member: 112&quot;]But that&#039;s the trouble with coating coins with oils - you have to remove them. And acetone can cause copper coins to turn all sorts of weird colors.</p><p><br /></p><p>Problem coins are problem coins and will forever be problem coins. And trying to &quot;fix&quot; the problem only creates new and different problems.</p><p><br /></p><p>While I can understand and in fact endorse the need for consrevation in order to prevent further damage to a coin, the vast majority of the time whatever it is that people try as their &quot;fix&quot; does 1 of 2 things - it either creates a new problem that must now be &quot;fixed&quot; - or it does more harm than good.</p><p><br /></p><p>This Verdigone product seems to be the lesser of the evils. It will remove verdigris from copper while causing minimal change to the rest of the coin. Nonetheless, change still occurs and any pitting caused by the verdigris will forever and always be there - thus the problem coin is still a problem coin. But it will be one that is better off than it was before.</p><p><br /></p><p>Using products like mineral oil, Coin Care, Blue Ribbon or any of the others - while looked upon with approval by some, is still looked upon with disapproval just as many or even more others. That you are altering the surface of the coin by using such products is indisputable - it is a cold hard fact.[/QUOTE]</p><p><br /></p>

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