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<p>[QUOTE=&quot;medoraman, post: 2235027, member: 26302&quot;]BD will spread, but I do not necessarily see BD here. What happened IMHO is the patina was already unstable and the soaking simply accentuated the instability. It would have come off anyway. The purple is simply a weird color of toning, one that (rarely) happens. It appears the coin is bordering on corroded anyway. Clean it up the best you can and call it a day. It wasn&#039;t your fault if you clean a coin in distilled water and it turns out bad. It was just too far gone. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie3" alt=":(" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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