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<p>[QUOTE=&quot;BadThad, post: 833122, member: 17261&quot;]<u>Oils ARE hydrocarbons</u>! LOL I never said that they were not. The difference between oil and a solvent such as xylene is that oils are actually complex mixtures of MANY (as in hundreds) hydrocarbons. There in lies the problem. Most of the hydrocarbons in oil are what we call &quot;long chain&quot;.....in layman&#039;s terms, they are big molecules. These big molecules are why oil has a higher viscosity than something like xylene. They are so large that most will not evaporate either (at normal temperatures), so with oil you have a selective evaporation over time. The short-chains will go first and the long-chains will go later. Over time, this will leave a tacky residue on the coin&#039;s surface.</p><p>&nbsp;</p><p>The bottomline, I agree with you on using oil on coins. LOLOLOL <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie8" alt=":D" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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