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<p>[QUOTE=&quot;physics-fan3.14, post: 3762116, member: 19165&quot;]Ok, I&#039;ll admit the analogy isn&#039;t perfect. However, the restorer would (should) try their absolute best to use period-correct paints, in very deliberated and measured strokes which match the original. Art conservation is a significantly more developed science, with widely accepted rules and conventions compared to coin conservation. We&#039;re sorta the Wild West comparatively. Perhaps that&#039;s because of the significantly higher dollar values? Or the more widespread understanding of the art medium? I&#039;m not sure. That&#039;s probably a different topic for a different thread. </p><p><br /></p><p>But imagine someone removing grime from a Walking Liberty half dollar. I think we&#039;d all agree that&#039;s okay. </p><p><br /></p><p>Now, if they start to gas it with a bit of H2S, I think we&#039;d all agree that&#039;s not cool.[/QUOTE]</p><p><br /></p>

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