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Old 08-20-2020, 02:28 PM
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USMCPOP USMCPOP is offline
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Join Date: Jul 2006
Location: Richmond, VA area
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Grind up some lichens into a paste and put in the joints. That's what the ancient monument builders did. Over the next couple hundred years, the lichens will eat into the rock and tighten the joints. Your paving slabs will last 1,000 years.

Er something like that.
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