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<p>[QUOTE=&quot;Just Carl, post: 893470, member: 4552&quot;]I&#039;ve always tried telling people to watch that TV show called The Antique Road show. On that show they always stress that old objects should not be cleaned. On one of thoes shows someone explained some of the reasons why. </p><p>For one thing when you clean almost any older item, you possibly remove some of the original material. Coins for example may have accumulated a layer of Oxydation and removing this, removes some of the metal.</p><p>For some older items the paint used way, way back actually tells how old something is and improper cleaning couuld remove that. </p><p>With coins the use of the wrong solution may remove excessive material and leave a coating of something that could end up really damaging coins. </p><p>Although many say Soap and water are OK, the really big problem there is Soaps and waters are different everywhere. Some soaps contain a pummis or abrasive material for the removal of some difficult substances. Some soaps contain mild acidic properties to remove items that require that. Waters too are and can be a disaster. For example water from your tap if gone through a water softener contains Salt. Which is why so many people end up killing thier house plants using this water. In large cities most of the water has been treated with Fluorine and/or Chlorine. Well water contains almost anything possible on Earth and some alive.[/QUOTE]</p><p><br /></p>

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