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<p>[QUOTE=&quot;GDJMSP, post: 1897087, member: 112&quot;]Yeah sure, it could be done. But I&#039;ve never actually seen one that was. I&#039;m pretty sure the reason it is not is because the time factor is much more of an issue with silver than it is with gold. With your background in chemistry if you stop and think you can probably guess why that would be.</p><p><br /></p><p>With gold, time is an issue because the putty dries out eventually and changes color making it more easily visible. But gold is a basically non-reactive metal. It tones, but nowhere near as easily as silver, (or copper). Silver on the other hand is a very reactive metal. It reacts and tones when it comes into contact with almost anything. So imagine, what would happen to the silver surrounding an area that was puttied ? It would change color, and much more quickly, thus making that area suspect and subject to close inspection. And long before the putty dried out and changed color itself, as well as making it a different color than the toned metal around it.</p><p><br /></p><p>So yeah, with skill, you could probably fool somebody by puttying a silver coin, but not for very long.[/QUOTE]</p><p><br /></p>

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