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Has anyone tried using the foam in the spray can? Here's what Im thinking: <br /> <br />The coaling tower and sand house will be mounted on a 12" x 30" board, but ground level will be about 3" above the board. The bottom of the coal pit will be resting on the board. I then could create sides, much like a facia board for a layout, that go up to ground level. Then fill this with the expanding foam and carve off what's not needed above grade level. <br /> <br />Any thoughts on this?
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