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<p>[QUOTE=&quot;Bronwen, post: 436857, member: 5833&quot;]The Casco people (they deal in contemporary Italian cameos) recommend leaving oil on overnight to &#039;hydrate&#039; them &amp; also suggest commercial jewellery cleaner for pearls.&nbsp; There&#039;s no reason to believe that oil can sink in, no matter how long you let it sit on your cameo.&nbsp; Like using moisturizer on your skin right after bathing, it may help hold in water after a soak.</p><p><br /></p><p>&#039;Connoisseurs&#039; is the brand name of a line of jewellery cleaning products; not too surprising they recommend them.&nbsp; I have their mild formula, which is the one recommended for pearls.&nbsp; Instructions say you can leave jewellery in the solution for up to 30 seconds, which I take to mean no more than that.&nbsp; This is what I think the Casco 30-second rule is about, not plain water &amp; mild soap.&nbsp; Although I have never visibly damaged a cameo by using the dip, I rarely resort to using it on cameos anymore - it&#039;s a little too effective on gemstone jewellery for me to trust it with softer shell!&nbsp; When I do, I swish the piece up &amp; down for just a few seconds before removing, brushing briskly at the problem spots that got the cameo dunked in the first place, then rinsing very thoroughly.</p><p><br /></p><p>The member who gave advice never went on to become a regular, so I have no sense of how knowledgeable/experienced they were.&nbsp; If you did more searching on this site you would find other threads where&nbsp; I put in my 2 cents.&nbsp; It&#039;s a contentious subject.&nbsp; A friend &amp; I even disagree over whether, if you&#039;re going to oil, it&#039;s OK to use scented baby oil or not.&nbsp; (She likes the fragrance; I wouldn&#039;t want to apply any extra ingredients, even if they are safe for baby skin.)&nbsp; I just know what has been effective &amp; seemed to be safe for me.</p><p><br /></p><p>This is not blanket advice for cameos of all types, and sometimes there are considerations with the setting.&nbsp; Care should always be taken not to leave a shell cameo for too long in conditions that promote <a href="https://cameotimes.com/index.php/reference/byne-s-disease" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://cameotimes.com/index.php/reference/byne-s-disease" rel="nofollow">Bynes&#039; &#039;disease&#039;</a>.[/QUOTE]</p><p><br /></p>

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