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<p>[QUOTE=&quot;SuperDave, post: 2907786, member: 1892&quot;]It sounds to me like the fundamental mistake being made here is choosing the wrong coins to conserve. If all you&#039;re looking at is &quot;tarnish,&quot; the result of an original metal oxidation process, and dipping doesn&#039;t remove all of it, then it&#039;s <b>too thick to dip</b>. Furthermore, if tarnish is all it is, acetone/xylene will have zero effect on it.</p><p><br /></p><p>I sincerely hope these are coins with no numismatic value, because the greater the success you&#039;re enjoying with this <b>harsh</b> chemical intervention, the lesser the value of the resulting coin. It&#039;s threads like this one which prove to me the fundamental wisdom of having decided to keep most of my conservation methods to myself, rather than publishing them as I originally intended a couple years ago. Anyone can learn and apply a scientific process, but it seems very few can cogently decide <i>when to apply it</i>.[/QUOTE]</p><p><br /></p>

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