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<p>[QUOTE=&quot;GDJMSP, post: 1136603, member: 112&quot;]The reason I&#039;m asking the questions is this. If you got the coins, both Proof and BU, from the same source, and both types of coins have a similar milky film on them, then that would lead to believe that is possible the milky film is PVC contamination. That&#039;s because business strike coins are not known to develop this milky film - while Proofs are known to develop the milky film.</p><p><br /></p><p>So if it is on both types of coins, then it is likely that the film has a common cause. And the most common cause is PVC contamination. PVC contamination, in its early stages looks just like haze. If that were the case then acetone would be what you&#039;d use to remove it on both types of coins. And it <u>needs</u> to be done !</p><p><br /></p><p>However, if the film is on the Proofs only, then you would use a different product because acetone will not remove haze. You would use MS70. A qucik dip in MS70 removes the typical haze (the milky film) commonly seen on Proofs. MS70 is what many Proof coins are dipped in immediately before they are sent in for grading. This allows the coins to get the highest grade they can.</p><p><br /></p><p>However, Proof coins dipped in MS70 to remove the haze before grading are commonly known to develop that very same haze later on, after they are slabbed. It doesn&#039;t happen every single time, but it does happen more often than not.</p><p><br /></p><p>For this reason it has been my advice to people that if they have Proofs that have haze, to just sell or trade the coins off and get new ones that have no haze. You will be much happier in the end.[/QUOTE]</p><p><br /></p>

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