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<p>[QUOTE=&quot;Just Carl, post: 359430, member: 4552&quot;]I think what this forum needs is sticky called coin cleaning. It comes up almost all the time and by the time it is all answered, other posts push it out of sight. Possibly if we just told people to use the search thing at the top they could find out about cleaning but a sticky would be the best. </p><p>Meanwhile back to cleaning a coin or anything of historic values. If you ever watch the Antique Road Show on TV you will always hear them say if you hadn&#039;t cleaned this item it would be worth XXX more. Sometimes an item goes from a few hundred dollars to many thousands if not cleaned. </p><p>Some of the reasons are usually clear. If you remove dirt from a coin, chair, cannon, etc. that dirt may have become part of the original material due to chemical reactions. When removed some of the original material is now lost forever. With a coin much of the so called dirt is just natural Oxydation or other air borne subtances that have formed a compound of the coins metal and that substance. Removing it removes some of the coin itself. </p><p>Many times during a cleaning people tend to use a brush, pick, stick or any such thing that will leave marks on the coins. Such marks also deminish a coins value. Some cleanings are done with substances that leave a residue on the coins that later create even worse corrosions, tonings or tanishings. </p><p>Some people drop coins into solutions and if only a small amount the coin bounces on the plate or glass. A delecate coin not has a ding on the rim. Small but there. </p><p>Some people try numerous substances for cleaning a coin and find that at the end there is a signicant amount of damage due to over kill. Battery Acid does that. </p><p>If you use Acetone, it really doesn&#039;t matter where you buy it but do this prior to use. Take a very clean glass dish, pour some of the Acetone in that outside preferably. Allow to evaporate completely. If there is any residue left at all, discard that Acetone as it is contaminated. Naturally the best place to purchase is a chemical supply house but that is expensive. If you have paint supply store that does a decent turn around in merchandise thier Acetone should be safe but test it to make sure.[/QUOTE]</p><p><br /></p>

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