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<p>[QUOTE=&quot;lkeigwin, post: 1226770, member: 30400&quot;]Acetone will not harm the finish or luster. I&#039;ve left silver and gold in acetone for many days...more than a week on occasion. It is perfectly benign.</p><p><br /></p><p>When folks speak of &quot;an old dip&quot; they&#039;re usually referring to a cleaning agent like JewelLuster (now called e-z-Est). It will remove tarnish/toning. Depending on the length and strength of the dip, and whether it is done more than once, it can damage the luster and make the coin looked washed-out. Failure to properly rinse can appear some time later as spotting, streaking, etc.</p><p><br /></p><p>FWIW, a single quick or diluted dip rarely does any measurable damage and sometimes can rescue an otherwise ugly-tarnished coin. Dealers have been doing it for decades. Even the TPG&#039;s do it at times.</p><p>Lance.[/QUOTE]</p><p><br /></p>

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