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<p>[QUOTE=&quot;robinjojo, post: 4588776, member: 110226&quot;]I&#039;ve had this coin for about a year.&nbsp; I noticed that the coin&#039;s surface appeared to be deteriorating in the NGC slab.&nbsp; Here&#039;s the coin removed from the slab:</p><p><br /></p><p>[ATTACH=full]1136263[/ATTACH] </p><p><br /></p><p><br /></p><p>[ATTACH=full]1136265[/ATTACH] </p><p><br /></p><p>So, I cracked it open and immersed it in distilled water for about a couple of months.&nbsp; I also used small quantities of alkalai washing soda. Much of the green deposits were removed this way, but other areas remained stubbornly in place. Then I noticed that these area were quite shiny.&nbsp; I immersed the coin in 100% acetone, and those areas disappeared. It seems that some kind of coating was applied to the coin, possibly clear nail polish.</p><p><br /></p><p>Here is the coin now. There are still some green patches left, but they seem quite hard, not powdery, so I do not think this is case of bronze disease.</p><p><br /></p><p>[ATTACH=full]1136272[/ATTACH] </p><p><br /></p><p>I have the coin out and it is being monitored for any changes.&nbsp; Of course it is very early in the game and things can change, especially with this type.</p><p><br /></p><p>I see that there is a wax, Renwax, on the market.&nbsp; Would it be advisable to use it on this coin?</p><p><br /></p><p>Thanks[/QUOTE]</p><p><br /></p>

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