From O'Day 302 Owners Manual
"A. HULL
The exterior of the boat is an isothphalic NPG gel coat, which is sprayed into the mold after the stripe areas have been masked off. Next, the masking is removed, and the stripe color is sprayed on. Now, layers of multidirectional glass fibre are laid into the mold to prevent pattern transfer from the successive layers of laminate. Finally, more layers of multidirectional fibre and bidirectional roving are applied untilt he correct layup thickness is attained. The thickness will vary, depending on loads applied and will increase from sheer to keel area."
B. DECK
The deck is hand laid up using glass strand fibres, woven roving and bidirectional roving. The deck is balsa corred for strength and weight reduction. In areas of high stress or compression, the balsa core is replaced with either plywood core, aluminum sheet, or solid glass. The nonskid area is molded in, and the deck is gelcoated as with the hull."