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<p>[QUOTE=&quot;marid3, post: 1365483, member: 35968&quot;]I used to work in a jewlery store, and learned all about abrasives, chemicals, common contaminents there.&nbsp; This guy is a highly certified pro, who restores artifacts for museums (my state museum being one).&nbsp; The ONLY thing he would use to clean jewlery/items is lightly pressurized steam of purified (not mineral, spring or tap) water.&nbsp; He had very powerful microscopes/equipment to examine, and this truely was harmless.&nbsp; AND he knew how to handle items (even a sterile room!)</p><p>&nbsp; </p><p>Now, I like this method - but it&#039;s expensive, and the problem I saw after one experiment is that when I cleaned a few of my coins (in his shop after hours), is that dealers thought I &#039;cleaned&#039; them with something else - lessening the value.&nbsp; </p><p><br /></p><p>IMO, there is one - only one - way to clean coins, and I still believe it&#039;s perfectly harmless.&nbsp; BUT . . .. because most can&#039;t, I got lumped into the group with 99.9% of others, and it depreciated my coin values.&nbsp; Unfairly, but I get it.&nbsp; </p><p><br /></p><p>My intent was never to pass something off as higher grade (I wasn&#039;t going to sell them, just wanted them assessed).&nbsp; Rather my intent was to remove the junk so you could truly see the underlying surface, and appreciate the coins.&nbsp; </p><p><br /></p><p>Oh, well . .. .[/QUOTE]</p><p><br /></p>

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