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<p>[QUOTE=&quot;lehmansterms, post: 4007259, member: 80804&quot;]Of course almost no one smokes any more - and smoke in the air acted as a strong toning accelerant in this scenario - but even with our relatively cleaner indoor air, leaving a coin on a window sill where it is exposed to light, and hopefully direct sunlight for some of that time, (a kitchen window is ideal as the cooking &quot;fumes&quot; will help) will create at least the beginnings of a natural toning/patina on bare metal in a couple of months. If it&#039;s a place that gets a lot of direct sun, try wrapping the coin in a single layer of newsprint (I know, almost no one reads physical newspapers any longer either, but that&#039;s the general sort of paper I&#039;m referring to) or other crudely finished, high acid-content paper. The sunlight will accelerate the toning process by liberating sulfur from the paper. </p><p>As in all &quot;kitchen table chemistry&quot;, YMMV.[/QUOTE]</p><p><br /></p>

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