We do not recommend the West System Six10 epoxy, it is too thick and no where near enough to complete your board. Resin needs to have a low viscosity to soak through the fiberglass and bond into the foam when laminating. Also the seal coat (hotcoat) needs to flow like water to self-level and reduce sanding. West System 105 can be used but it is brown resin and becomes more brown in the sun. It is designed for boats, not surfboards and thus does not have the flex properties a surfboard requires.We recommend Resin Research Epoxy which is specially formulated for surfboards.