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<p>[QUOTE=&quot;brg5658, post: 1299603, member: 29751&quot;]I don&#039;t think it&#039;s the &quot;sun&quot; that is causing what you&#039;re describing.&nbsp; It&#039;s likely a combination of the chemicals (plasticizers) leeching from the dashboard, and the <b>heat </b>generated by the direct sunlight.</p><p><br /></p><p>Your biggest enemy for damage to coins will be gases and chemicals in the air.&nbsp; Different metals react differently.&nbsp; The other biggest enemy of coins is heat.&nbsp; Light itself (i.e., photons) will not damage coins that I know of; however, side effects of light like heat and it&#039;s interactions with plasticizers, etc. can cause major damage to coins.</p><p><br /></p><p>Questions for you:</p><p><br /></p><p>1.&nbsp; What kinds of coins are these (composition, encapsulated/graded, etc)?</p><p><br /></p><p>2.&nbsp; What is the value of these coins?&nbsp; If they are displayed for &quot;interest&quot; and have little numismatic value, then I wouldn&#039;t worry too much either way.[/QUOTE]</p><p><br /></p>

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