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<p>[QUOTE=&quot;Bronwen, post: 354054, member: 5833&quot;]It is certainly not in order to do anything that would change the patina.&nbsp; My cleaning question is what to do, if anything, about this:</p><p><br /></p><p>[ATTACH=full]120391[/ATTACH]</p><p><br /></p><p>Peering down into it at first thought it was just dust accumulated in crevices.&nbsp; Now I think it might be a mineral salt deposit that has leached out of the sepiolite; it resembles a bit the &#039;Byne&#039;s disease&#039; that can develop on calcium carbonate-based materials.&nbsp; When I thought it was dust, was going to moisten a swab tip &amp; see whether the worst of it would come out with light rubbing.&nbsp; The incrustation produced by the Byne&#039;s process is water soluble, so, even if not dust, this might also wipe off.&nbsp; Question is whether to leave it untouched as further evidence of age?&nbsp; Byne&#039;s is progressively destructive.&nbsp; What do we think about this?[/QUOTE]</p><p><br /></p>

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