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<p>[QUOTE=&quot;Curtis, post: 1319429, member: 26430&quot;]Great finds for a &quot;junk box&quot;! Especially Probus. Tacitus is nice as well. Too bad that his face suffers the most encrustation (and possible BD--though I wouldn&#039;t jump to that conclusion based on the photo).</p><p><br /></p><p><br /></p><p>I do clean (or have cleaned) a lot of coins, sometimes more so than I should have, but in my opinion the Probus looks just fine for what it is-- still has nice silvering, which would likely be damaged by any vigorous cleaning. The encrustations don&#039;t detract too much, and would be challenging to remove without gouging and scratching it up. It&#039;s an attractive coin.</p><p><br /></p><p><br /></p><p>It might be a little easier to clean off Tacitus&#039; face and obv from 2&#039;-4&#039;, though it looks like someone may have already had a go at it.</p><p><br /></p><p><br /></p><p>You&#039;re probably already aware, but the BD is likely treatable without doing much damage. If you don&#039;t want to use one of the carbonates or commercial products, then there&#039;s another very effective, but controversial and potentially abusable, solution: brushing it gently with a very dilute solution of silver nitrate (used as a swimming pool algicide, or you can get it in powder form). You risk leaving an artificially &quot;re-silvered&quot; surface if you leave it on too long, especially with a flan that was originally silvered or made of billon (thus the abuse potential). For example, here&#039;s an experiment I did with a Hadrian Sestertius that was being devoured by BD. Though it has arrested the BD for the last 15 or 16 months, it also changed the patina noticeably: <a href="http://ancientcoincollectors.blogspot.com/2010/09/solution-get-it-to-bronze-disease.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://ancientcoincollectors.blogspot.com/2010/09/solution-get-it-to-bronze-disease.html" rel="nofollow">http://ancientcoincollectors.blogspot.com/2010/09/solution-get-it-to-bronze-disease.html</a> </p><p>&nbsp;I&#039;m not a chemist, so I can&#039;t explain why AR removes BD, but it does; it&#039;s not just painting over it (as explained by an actual chemist linked above).[/QUOTE]</p><p><br /></p>

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