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<p>[QUOTE=&quot;doug5353, post: 2098197, member: 73555&quot;]Yes, many times.&nbsp; It is generally worthwhile only on stained SILVER AU-BU sliders. </p><p><br /></p><p>There is no abrasive content to ammonia, it is strictly a chemical reaction.&nbsp; It will REMOVE toning in a flash.&nbsp; NEVER use ammonia on copper, nickel, brass; nothing but silver.&nbsp; It tends to modify the natural color of gold, making it more yellow, so I don&#039;t use ammonia on gold either.&nbsp; That may be the natural reaction between ammonia and the 10% copper normally alloyed into gold coins.</p><p><br /></p><p>Household ammonia (NH3 in water) is not flammable.&nbsp; Strictly my opinions.[/QUOTE]</p><p><br /></p>

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