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<p>[QUOTE=&quot;desertgem, post: 422920, member: 15199&quot;]Bill, some people dip their coins ( especially copper) into a solution like Blue Ribbon preservative and cleaner, Coin Care, MS-70, etc under the guise of &quot;protecting&quot; the coin, but it also hides many defects as it is an oil ( often called lubricant) and tends to hide or minimize corrosion If it a pure based oil, probably wouldn&#039;t do any damage, but I disagree with its use myself. I make it a habit of putting&nbsp; all coins I purchase into a small container of acetone ( some prefer xylene) which will not endanger the coin, but will remove organic material such as yet unseen fingerprints or microscopic pvc deposits. and then into safe storage.</p><p><br /></p><p>Jim[/QUOTE]</p><p><br /></p>

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