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<p>[QUOTE=&quot;Dockwalliper, post: 89691, member: 392&quot;]oxidation</p><p><br /></p><p>Modern objects and coins might be made of CUPRONIKKEL. Nikkel is a very hard material. In some aspects it is like precious metals, they hardly ever corrode. If they are stained, there are several things you may try. </p><p>Clean with a lint free cloth that is soaked in Ammonia. </p><p>Clean in a solution of 30:1 Spirits and Sulphuric Acid, remember, add the Acid to the Spirits, NOT the other way around.. </p><p>Remove the stains by rubbing with Stearin Oil. </p><p>Rust like spots may be removed with a peace of bacon, simply run the object with the bacon. Afterwards rub ith Ammonia.[/QUOTE]</p><p><br /></p>

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