I've ripped apart an old tyronsea slalom board with the intention of making a smaller surfboard out of the blank. it has no stringer, and appears to be that kind of foam made up of small spheres (styrofoam?polystyrene? ) . the board was a tyronsea flyer ,SP115 epoxy laminating system, 'hydrofoam' . two questions :will it work as a surfboard with no stringer, and is this foam suitable for use with polyester resin. the blank is in good nick and has come away from the glass cleanly .
I didn't find the right solution from the Internet.