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<p>[QUOTE=&quot;robinjojo, post: 8330685, member: 110226&quot;]If you decide to keep the coin, take the incremental approach.&nbsp; Based on the photo the BD seems to be in small spots.&nbsp; Soak the coin in distilled water and, using a wood toothpick, dislodge the BD as the water softens it.&nbsp; This might take several days.&nbsp; Remove the coin, dry it, and put it in a spot were you can keep an eye on it.&nbsp; If the BD reappears, repeat the process.&nbsp; There will be pits where the BD was present, but for your coin it doesn&#039;t seem to be too invasive.&nbsp; </p><p><br /></p><p>After the BD seems to be gone, keep the coin out for further observation, say for another month or two at least.&nbsp; If you live in a humid area, heating the coin in the oven at a low temperature (200 degree) to remove any excess moisture after the last soak might be worthwhile.&nbsp; If the coin, after a few months, appears to be BD-free, then you might consider sealing the surfaces Verdicare or Renwax.&nbsp; This is optional.&nbsp; I&#039;ve done this with only a few of my ancients.</p><p><br /></p><p>But the fundamental question that you need to address before you undertake the treatment is whether you want to keep the coin or return it.&nbsp; Will you be happy owning the coin after treatment or would it be better to return it and search for another one?&nbsp; Remember, there will be other opportunities to acquire one, perhaps without the issue of BD.&nbsp; That&#039;s the question that you need to answer.[/QUOTE]</p><p><br /></p>

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