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I have had boards that develop a crack like that, right through the foam core. I still use a board with a similar stress crack and it is stable and rides well. However, with the stringer broken like that it is just a matter of time until your board flexes too much and becomes unusable. Could surfboard sanding have made it permanently weaker? Perhaps, if ...


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The disclaimer: I'm not a surfer but I've spent a lot of time working with composite kayaks, and I've done some rapid research into surfboard construction. The structure: Foam, stringer, fibreglass shell, gelcoat The polyester foam has minimal strutural use, it's primary function is to be a mould around which to wrap the fibreglass though it does have some ...


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