Hi Ed, Epoxy will not melt styrofoam. Any ester or vinyl ester resin will. My wings are made from blue styrofoam with epoxy/glass skins. Scarry! :) Buly I used the solid pink foam from a lumberyard (had to glue several planks together). I taped it with duct tape to prevent the foam from dissolving when I put on the epoxy - work fine for me. Ed A
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