Anyone tried making a board with Styroform and epoxy? I’m considering going this route since those materials are much easier to obtain then surfboard polyester and blanks. I’ve found several references for building boards with these materials but all for sailboard building. They claim to make very strong board with very low weight, but they use exotic materials such as divinycell, kevlar and carbon for reinforcement in high stress areas. They also use vacuum pumps for the laminating process. Quite a hassle. I’m thinking of using sheets of Styroform glued together, then hotwire cutting the rocker and outline to minimize handshaping. From what I understand it is possible to shape styroform by regular meens like planers and sanding, although more time consuming. I’m gonna skip the vacuum pump and divinycell and glass it the regular way, 3x6oz on the deck and 2x6oz on the bottom. Should be strong enough. The board will be a longboard for small mushy summerdays and break which are no good on a shortboard. Should I adjust the dimensions so bouyancy is the same as a simmilar polyester board? What I’m especially curious of is the strength properties of Styroform vs. polyurethane cores. I’ve found specs for styroform and divinycell, but I’m having trouble finding any specs on clark blanks (or any other blanks for that matter). Can anyone help me? While we’re at it, anyone used divinycell only for a board? I understand they are sometimes used in wakeboards. Any disadvantages except the grey color?