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<p>[QUOTE=&quot;kevin McGonigal, post: 3961772, member: 72790&quot;]I see your point. On any silver coins I have tried it on, nothing came off and actually nothing at all seemed to happen. If the material has formed a barrier to future corrosion the barrier seems invisible. On the bronze and brass nothing came off of the coins when using a tiny paint brush (the kind I use to paint model figures). Only when I buffed them, gently, did a very slight greenish to blackish stain come off on the soft white cloth I was using. The only way I could determine that the micro-crystalline was applied was that on bronze and, to a lesser extent on brass, was that they seemed a bit glossier. I totally understand reluctance to use the material on my better coins, at least until I can obtain actual hands-on experience with the experience of other coin collectors who have used it. As I said above, museums seem to like the material but their concerns and goals may be&nbsp; different from those of hobbyists&nbsp; who I would like to hear more from. Thanks for you information and I hope others will relate their experiences, perhaps with their own before and after pictures and analysis.[/QUOTE]</p><p><br /></p>

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