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<p>[QUOTE=&quot;Ordinary Fool, post: 2774893, member: 85318&quot;]There is zero need to physically touch or work the surface of that coin to conserve it, and certainly not with anything more intrusive or damaging than a fox or camel hair paint brush.</p><p><br /></p><p>Soak it, water then acetone then xylene</p><p><br /></p><p>Go through it again and if still not happy and since it is nickel having a much tougher skin than silver, help it with a brushing.... no tooth brush or such and certainly not a wire wheel, motor or hand powered.</p><p><br /></p><p>If still no joy, let it swim in an ultrasonic with non-phosphorus detergent and water although the peroxide with vinegar will eat off many things including the surface if left in overnight or so.</p><p><br /></p><p><br /></p><p>To think you&#039;ve nothing to lose while having no idea if that is a valuable variety may prove foolish. You surely don&#039;t want to reduce or lose what could be many dollars if that is a 1916 DDO or other potentially valuable buffalos even conserved from its current condition, by ruining it on purpose.[/QUOTE]</p><p><br /></p>

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