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<p>[QUOTE=&quot;-jeffB, post: 3274326, member: 27832&quot;]Many plastics <i>yellow</i> over time with UV exposure, and can turn more brittle as well. But I think the <i>fogging</i> you see on headlights is from <i>abrasion</i> -- hitting dust, insects, and gravel bits as you&#039;re driving. Look closely at fogged headlights, and you can see the scratches. You can polish them out, too.</p><p><br /></p><p>I think we&#039;ve all seen scratched slabs, and I know there are products available to polish them. I&#039;ve never seen a yellowed slab, but I&#039;ve also never met anyone who&#039;s left a slab out in the sun for several years. Even if the plastic and the coin held up, the <i>label</i> certainly wouldn&#039;t fare too well.[/QUOTE]</p><p><br /></p>

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