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<p>[QUOTE=&quot;desertgem, post: 534157, member: 15199&quot;]Spock , if you have a <b>cracked</b> slab. then don&#039;t use it. A crack would go through the plastic, and would be letting environmental problems go through&nbsp; it.</p><p><br /></p><p>A <b>scratch </b>( what I am talking about does not penetrate through. It is a surface effect. </p><p><br /></p><p>Like the difference between a dent in your car door and a bullet hole through it.</p><p><br /></p><p>Cheers,</p><p>Jim[/QUOTE]</p><p><br /></p>

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