Message:

<p>[QUOTE=&quot;Insider, post: 3113074, member: 24314&quot;]Only one acid can etch gold so most of the luster loss is due to wear or some chemical coating.&nbsp; These additives fall under the name of &quot;putty.&quot;&nbsp; They are dissolved in a &quot;carrier chemical&quot; that evaporates.[/QUOTE]</p><p><br /></p>

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