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<p>[QUOTE=&quot;The Penny Lady®, post: 833582, member: 16948&quot;]Well, I just have to chime in here a little.&nbsp; I&#039;ve read through most of this thread, though not every word, but there is one area that I don&#039;t think has been touched on.&nbsp; Copper.&nbsp; Most of you know I specialize in copper and have been collecting and dealing in copper for close to 20 years.&nbsp; Copper is a porous metal and over time absorbs dirt, dust, grime, etc.&nbsp; It is my opinion that using an oily substance (Coin Care, Blue Ribbon, or even olive oil) not only helps to remove the dust and grime from circulated copper, but it also helps to condition old dried out circulated copper.&nbsp; I also sometimes use it on uncirculated brown copper if I feel it has that dried-out look.</p><p><br /></p><p>I also use it on most of my circulated copper before I put them in 2x2 holders to make sure any possible &quot;spit spots&quot; are removed so that corrosion doesn&#039;t develop over time.&nbsp; Actually, I have a rag that I&#039;ve used for this purpose (unwashed) for over 15 years to pat dry any excess Coin Care residue on copper and now I usually just use the rag without adding any additional Coin Care, unless the coin is really full of grime.&nbsp; Often, just using a little Coin Care or oily substance can remove light verdigris from copper which again is much better than leaving verdigris to grow and cause more damage to copper.</p><p><br /></p><p>I understand there are different meanings in using the word &quot;cleaning&quot; when referring to coins.&nbsp; Some chemicals actually change the surface quality (whizzing or harsh brushing) or remove the original patina of a coin (dipping in a jewelry cleaner for example) - to me, that is <b>inappropriate </b>cleaning - it is comparable to refinishing antique furniture which devalues the piece often by half or more - the same is true for coins.&nbsp; However, using an oily substance that does not change the surface quality, causes no hairlines, and doesn&#039;t remove the original patina of a coin (or a piece of old furniture), in my opinion, is acceptable and is even helpful to a copper coin.[/QUOTE]</p><p><br /></p>

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