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<p>[QUOTE=&quot;krispy, post: 976588, member: 19065&quot;]I understand what you are saying about the print being etched into the metal. I&#039;m curious about the degree of this, not to suggest that I am hopeful in any way to reverse that which cannot be reversed due to the amount of time the print was allowed to set in and the metal around the print to change, but curious if it is more the oils in the print, that may contain acidic qualities, which are more responsible for the &#039;etch&#039; or if a fingerprints greasy quality actually acts to protect the metal it covers and what appears as an etched print is due to changes of the exposed metal outside and around the print itself? I suppose it can be a near impossible combination of the these factors from one print-laden coin to the next to cite the exact cause, especially when we don&#039;t always know before and after conditions in which the coin obtained the print let alone the unique qualities of the print-maker. The very nature of one person&#039;s print differs from another person&#039;s as our chemical make up, skin cells left behind or the prescience of foreign matter on fingertips at the time of leaving a print on the coin all vary. Inability to determine those factors precisely may suggest that &#039;time&#039; is our ultimate factor of gauging successful removal of a print from a coin. If time is not to our advantage the degree of the other factors works against successful removal of a prints effects on the coin. The time the print has been allowed to set in (etch) and change the metal, or the metal around the print to further oxidize in the environment it is stored or traveling around in, simply cannot be reversed. What&#039;s done is done.</p><p><br /></p><p>I have also done a few experiments with MS70 on copper LMCs, on pre-82 and those that came after, and I know that it makes for some wild AT! Deep blues and magentas are easily obtained.[/QUOTE]</p><p><br /></p>

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