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<p>[QUOTE=&quot;Boss, post: 424077, member: 15110&quot;]<b>blow off the dust and preserve (accidental unhappy face- how do I remove?)</b></p><p><br /></p><p>Bill here are my humble thoughts on the subject: I agree with the bulb for blowing off dust, though have not done it myself. If you bought any of those coins I would get the dust off because those coins will be harmed with time. Pure acetone should also remove the dust and will usually remove some other types of damage (leave small amount in glass dish, let evaporate to see if residue; if so, then it is not pure and will change colors of coin) . I use &quot;Coin Care&quot; which is an oil based/solvent product which I dab (no rubbing) with a microfiber cloth. Also have used pure mineral oil which may be better. Never had any problem and coins are preserved. I have looked under 20x magnification before and after process with no damage (removed with acetone several times to see if any hairlines). Maybe visible under many times magnification- 50+??? but who cares. If anyone is looking at a coin with greater than 20+ magnification they should get a life!!! The damage from carboard dust is much worse than this speculative invisible damage. This is basic chemistry. All elements in oil based products have a strong and equal attraction toward each other which cannot be broken except by a solvent. Metals by their chemical nature are reactive with ionic compounds like sulfer or pollutants in the environment. These contaminants will not get past the oil barrier on the coin as they are not strong enough to break those covalent bonds within the oil. People who say NEVER CLEAN A COIN are grossly over generalizing. Do a search on &quot;Cleaning&quot; and &quot;verdigris&quot; on this forum and you will find further evidence of what I am saying and others arguements against PRESERVATION are quite weak and unscientific. Besides look at the NCS website and see before and after coins which get graded by NGC and you&#039;ll see that the never clean the coin group simply lacks the knowledge or skill to preserve their coins in the appropriate way. NCS has the ultimate &quot;secret&quot; techniques which none of us peon&#039;s seem to know what those are. Ultimately humidity has to be controlled which I have finally achieved with a ridiculous # of dessicants and room a/c. Sorry to get so opinionated or to offend &quot;the other side&quot; but I feel very strongly about this, because without preservation the overall supply of nice coins will dwindle over time due to environmental damage.[/QUOTE]</p><p><br /></p>

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