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<p>[QUOTE=&quot;desertgem, post: 2657280, member: 15199&quot;]Its hard to convince by the photos . I suspect that existing corrosion was removed. The peracetic acid produced is actually a weaker acid than the original acetic acid portion, unless evaporation concentrates it and then it can become a significant health hazard, but it can be used industrially. I went to my collection of &#039;interesting&#039; ads from the past ( well to the 60s), and no Nic-A-Silver or similar products and then it was considered more OK to mess with coins, so I remain doubtful.[/QUOTE]</p><p><br /></p>

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