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<p>[QUOTE=&quot;Insider, post: 2550326, member: 24314&quot;][USER=22331]@imrich[/USER] posted: &quot;Over the years, as a scientist, I&#039;ve developed proprietary processes which are harmless to a coin, but will reverse environmental deterioration conditions.&quot;&nbsp; <span style="color: #b300b3">I&#039;ll tell you some if you tell me some. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" /></span></p><p><br /></p><p>&quot;I&#039;d never tried a cleaner as Acetone which had been stated innocuous in many threads.&quot;&nbsp; <span style="color: #b300b3">While acetone is one of the dip preps, I always thought everyone knew acetone melts plastic! &quot;</span>The coin had been in a slab for ~20 years, and had a surface &quot;toning&quot; which I&#039;ve seen on many of my slabbed coins.&quot;&nbsp; <span style="color: #b300b3">That is the &quot;good&quot; haze the TPGS&#039;s like.&nbsp; It is called &quot;skin.&quot;&nbsp; It is best to leave it on a coin.</span></p><p><br /></p><p>&quot;I thought I&#039;d see if Acetone which I&#039;d purchased in the past, still in a sealed container, would have any affect on the toning if I added some solution into the holder, and just &quot;sloshed&quot; around for a short interval after lifting an edge and basting beneath. After closing the holder, and rotating for ~1 minute, the coin was welded to the holder, ruining a ~$6500 coin.&quot;&nbsp; <span style="color: #b300b3">Acetone melts plastic.</span></p><p>&quot;When the coin was eventually extracted, it had plastic residue on the bottom face, a film on the top face, and plastic on my fingers, with epidermis damage.&quot;&nbsp; <span style="color: #b300b3">Many coins like this are sent in for conservation.&nbsp; The &quot;fix&quot; is very simple yet time consuming.&nbsp; The coin and the plastic are put into a covered dish of fresh acetone.&nbsp; Several steps later using more fresh acetone, the coin is restored to normal with no loss of value..</span>[/QUOTE]</p><p><br /></p>

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