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<p>[QUOTE=&quot;sand, post: 8185480, member: 118540&quot;]The more I think about it, I think that, the only way to know, when to stop, is when you reach something that is a different color, than what you are removing.</p><p>For example, if you remove brown dirt from a bronze coin, then the time to stop, is when you reach the underlying black or green patina.</p><p>If you remove black tone from a silver coin, then the time to stop, is when you reach the underlying silver metal.</p><p>If you remove a layer of brown patina, then the time to stop, is when you reach a layer of different colored patina (for example, the underlying black or blue patina).</p><p>But, if you are removing some of the patina of one color (for example black), but leaving some of the patina of that color (for example black), then you really don&#039;t know, whether you are revealing the true edges and details of the underlying devices, or if you are creating edges and details which are unrelated to the underlying devices.</p><p>For example, the letters of the OP coin, as [USER=88526]@Jay GT4[/USER] mentioned. If you are removing some of the black patina, but leaving some of the black patina, then it seems like, there is no way to know, if the letters that you have carved out of the patina, are related to the true shapes of the underlying letters of the metal.</p><p>Perhaps, in the case of the OP coin, it would be better, to strip off all of the black/blue patina, resulting in a red, bare metal coin. Then, the true shapes and details of the devices would be revealed.</p><p>Or, perhaps it would have been better, to just leave the OP coin alone, with the original thick blue/black patina, even though the devices were almost completely invisible.[/QUOTE]</p><p><br /></p>

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