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<p>[QUOTE=&quot;Stork, post: 2690214, member: 71642&quot;]Am I too simplistic in my thinking?</p><p><br /></p><p>Acetone/organic solvent is more like &#039;washing off&#039; a coin.&nbsp; No metal changes, just taking off some kind of contaminant to stabilize the surfaces and reveal the natural coin.</p><p><br /></p><p>&#039;dipping&#039; is a chemical process that removes/changes at the micro level.</p><p><br /></p><p>Cleaning is &#039;a scrubbing&#039; of some sort--a metal movement on the macro level to get rid of some gunk/toning and leaves the hairlines. Polishing is the most egregious example--might look good from a distance but up close is pretty awful and obvious.</p><p><br /></p><p>Doctoring is actively changing a property of the coin (adding toning with chemicals/environment actively applied, or doing something to conceal a flaw such as putty/laser).</p><p><br /></p><p>I forgot what the the real definition of whizzing is, but IIRC it is an extreme chemical stripping process.</p><p><br /></p><p>To me &#039;conservation&#039; is supposed to be a &#039;spa treatment&#039; where the coin has a problem such as PVC/surface contamination of some sort and this is removed by someone who knows what they are doing.&nbsp; But, also, might involve some sort of minimal chemical processing which CAN do some slight alteration with the goal of maximizing what is already present.&nbsp; </p><p><br /></p><p>Sort of like going to a spa vs. going to the plastic surgeon or the dermatology clinic.&nbsp; One is to enhance the reality, the other is to get a new reality.</p><p><br /></p><p>I&#039;ve sent in a few coins and medals to NGC--all because they had some kind of visible crud on them I wanted gone (not just PVC though that too, but some kind of cruddy looking stuff) because it was likely continuing to cause harm that would only get worse.[/QUOTE]</p><p><br /></p>

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