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<p>[QUOTE=&quot;Boss, post: 560469, member: 15110&quot;]I orgininally messed up my S VDB if any recall by trying to remove verdigris with one long acetone soak (several days).&nbsp; The toning was dellar&#039;s darkener that it removed which showed old hairlines.&nbsp; I only use Verdigone now, to remove verdigris.&nbsp; Jim, chemist dude, says long (overnight) soaks in acetone will act like a weak acid- I think it was him who said that.&nbsp; I would use acetone to remove tape residue.&nbsp; If your hesitant, I think NCS is good with these type of problems if you have a high dollar coin.&nbsp; Copper is the riskiest to &quot;clean&quot; as you probably know, the man 12[/QUOTE]</p><p><br /></p>

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