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<p>[QUOTE=&quot;Michael H Webb, post: 3512517, member: 93313&quot;]They don&#039;t show any protection that might be used by employees for restoring coins.</p><p><br /></p><p>Used my bare hands to maneuver this Kangaroo Dollar that had an unsightly black dot on the obverse side of the rim to hide a very minor gouge. Then, poured isopropyl alcohol to remove the ink:</p><p><br /></p><p><img src="https://i.imgur.com/xBTQKxq.jpg?1" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><img src="https://i.imgur.com/rAgc9mV.jpg?1" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p>I dropped the coin onto my linoleum &quot;wood&quot; floor, only to graze the kangaroo with my thumb as it fell.</p><p><br /></p><p>I hurriedly put on my Butyl II gloves and rinsed the coin with acetone to remove to skin oils.</p><p><br /></p><p>While the butyl gloves are safe to use for a time with acetone for the skin, the gloves impart a milky residue on the coin surface still wet with acetone.</p><p><br /></p><p>A few more washes with isopropyl and then distilled water in an ultrasonic cleaner <i>visibly</i> removed the residue, however, after grading, my new DSLR camera notices the blue residue. This would be same blue patina left by exposure to the elements, for example, except that the blue patina surrounding HRM&#039;s chin coincides exactly with original butyl glove/acetone residue.</p><p><br /></p><p>Now, I take high-res pictures before sending coins to be graded, and frequently replace the distilled water in the ultrasonic cleaner to remove dust, dirt, and water-soluble chemical impurities that will quickly fall from the coin in seconds.[/QUOTE]</p><p><br /></p>

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