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<p>[QUOTE=&quot;chascat, post: 2430273, member: 76792&quot;]This is very common with Proof Coins.&nbsp; Before 1990, mint packaging was poor, so some of your coins might haze over. They were covered with oil, smog, sweat, debris, etc. and then packaged in poor quality products.&nbsp; I don,t buy any kind of dip acetone, or coin cleaning products.&nbsp; Just a 50/50 solution of clear household ammonia and distilled water.&nbsp; Hold by edges, dip several times, rinse well in warm tap water, rinse again in distilled water.&nbsp; Dry with a hair dryer.&nbsp; Don,t dip copper coins unless you reduce the amount of ammonia by another 50%.&nbsp; They may turn pinkish in color or bright brassy look.&nbsp; Safe for silver and clad proofs, this usually removes all of the haze due to environmental damage, humidity, and poor packaging.&nbsp; Many times they look better than original coins.[/QUOTE]</p><p><br /></p>

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