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<p>[QUOTE=&quot;Numismat, post: 1324984, member: 15019&quot;]This is a great method for improving eye appeal. The oil itself will likely last longer than the collector. </p><p>I&#039;ve had collections where coins were oiled and put into slips 30 or 40 years ago and there doesn&#039;t seem to be any difference between the ones that I have recently treated this way. If anything, certain oils will develop an unpleasant smell over the years, but appearance seems to remain</p><p><br /></p><p>Aside from pvc/corrision spots, this also works well on coins that have developed funky colors due to chemical cleaning. It evens out color variation and dulls that unnatural iridescent color that dipping can cause.</p><p><br /></p><p>One small note when using it on copper and bronze: You may want to lightly wipe off excess oil with a soft tissue. It will leave enough to have the desired &quot;cover-up&quot; effect, but will not make the coin so glossy as with that Hong Kong cent.[/QUOTE]</p><p><br /></p>

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