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<p>[QUOTE=&quot;rlm&#039;s cents, post: 519357, member: 7957&quot;]Most of what you say is correct, but most of the rest is not applicable on the scale we are interested in.&nbsp; For coins, you are only interested in the surface molecules.&nbsp; MSDS&#039;s deal in large reactions.&nbsp; You need to study ionic/covalent bonding more.&nbsp; It is a type of bonding, not a type of element.</p><p><br /></p><p>All in all, what you say about mineral oil is close to right, however, what else is in the mineral oil?&nbsp; If you read that reference I made earlier (in another thread) about acetone affects copper, it is not the pure acetone that does the damage.&nbsp; However, acetone reacts with the air to form a compound that does react with the copper.</p><p><br /></p><p>You present the biggest argument against using oils.</p><p><br /></p><p>Dust is known to spot coins.&nbsp; Is mineral oil known to prevent spotting?&nbsp; And, no matter what you do, can you guarantee that&nbsp; there will be no dust in your slab/airtite?[/QUOTE]</p><p><br /></p>

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