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Originally Posted by spareparts
never had any luck getting resin to stick to treated, just always used forming grade plywood, its one step below marine, they use it to form concrete, sometimes you can find it at the super stores, usually has a red paint on the edge, can't remember the official name for it, but its exterior grade with a B/C finish.
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Spares - I think your talking about MDO medium density overlay or HDO high density overlay. smooth paper face on one or two sides . . . I used MDO to raise my stringers 1.5" on a project (that I wish I never started). It was great stuff. A 4x8 of 3/4 cost me roughly $60 (typical west coast gouge).
