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<p>[QUOTE=&quot;John Burgess, post: 7552057, member: 105098&quot;]not to step on anyone&#039;s toes in their diagnosis, but blowing up the pictures on a desktop, it&#039;s very clear this is zinc oxidization or &quot;zinc rot&quot;.</p><p>the pictures get blurrier when I blew them up even larger and I dont&#039; have the skill to fix it, but it&#039;s definitely zinc rot and exposed zinc and copper plating is coming off because the zinc under it is corroding. none of the copper has toned much, on either of the metal compositions. if it were a chemical doing it there would be far more toning of the copper after 39 years of sitting in it or even 10 years. these are all still Red to red/brown range.</p><p><br /></p><p>[ATTACH=full]1302857[/ATTACH] [ATTACH=full]1302858[/ATTACH] [ATTACH=full]1302859[/ATTACH][/QUOTE]</p><p><br /></p>

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