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<p>[QUOTE=&quot;john1942sept, post: 1916317, member: 54792&quot;]I have tried acetone and water on wornslick silver quarters that will never be more than silver.&nbsp; Water is a little more effective.&nbsp; It takes off some of green, but not all.&nbsp; This likely has been there for 70 years or so.&nbsp; I have left some coins in acetone for over a week.&nbsp; The tooth pick does take off some spots and acetone appears to make that a little easier.[/QUOTE]</p><p><br /></p>

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