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<p>[QUOTE=&quot;TIF, post: 2512372, member: 56859&quot;][USER=80147]@Ancient Aussie[/USER], if you are reluctant to re-treat with sodium sesquicarbonate, perhaps a compromise would be to treat with VerdiCare and check the coin every week or two.&nbsp; If you apply a generous amount of VerdiCare and let it soak for a while (overnight), rubbing occasionally with a VerdiCare-soaked cotton tip swab, the bright green will darken which may improve the appearance.</p><p><br /></p><p>Recently I treated some early-stage BD coins with VerdiCare letting them soak overnight.&nbsp; On one, the previously green areas turned reddish and hard.&nbsp; I don&#039;t remember which copper compound is red, but I guess the VerdiCare converted some of the cuprous chloride to copper-something-else.[/QUOTE]</p><p><br /></p>

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