Join Date: Feb 2010
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I would put an initial coat of thinned (i.e., penetrating) epoxy to seal all the surfaces of the plywood, and then use thickened epoxy to bond the plywood to the fiberglass. The thinned epoxy will essentially be integrated into the first ply of the plywood, making it virtually impossible for separation to take place (barring delamination within the plywood, that is).
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