one layer of bi-directional cloth cut on the 45q bias. Cut this cloth large enough to extend all the way up to the top of the fin and the spar. Saturate it thoroughly, taking special care to relieve air bubbles at the forward end where the left and right fin shells join. After the laminate has cured, trim off the excess cloth and sand the tops of the fin shells smooth. Also, like the fuselage bulkheads, the fin rib demands a drain hole to prevent water from collecting. In this case, drill a 1/4" hole through the vertical fin spar web just above where it meets the rib.
