Before 3rd coating of epoxy I apply a special glass tape reinforcement from bow to aft over the backbone, outside of the hull. I use 100 mm wide glass tape in one layer, because I’ll coat the whole hull with glass cloth. Dudley Dix suggested 450 g/m2 biaxial glass cloth for the mast step area, but it could be purchased only in 100 m length roll for outrageous price. However I could buy carbon cloth in the quantity I really need. The resin I use (SR 5550 by Sicomin) is perfectly suited for both the glass clothes and the carbon clothes also.

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Also reinforced the bow