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<p>[QUOTE=&quot;Theodosius, post: 3986211, member: 77077&quot;]Cleaning with sodium hydroxide creates these red deposits.&nbsp; They may be from a heavily encrusted group that was cleaned up with sodium hydroxide.</p><p><br /></p><p>I bought a set of LRBs from a dealer who had a big group that were found all stuck together with encrustations. Sodium hydroxide was used to clean and separate them and they look similar to yours only with even more red.</p><p><br /></p><p>I never had much luck cleaning the red stuff off so I just kept them as they are.</p><p><br /></p><p>John[/QUOTE]</p><p><br /></p>

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