At everythingpontoon we offer marine plywood by the sheet or in quantities. home; boat seating. premium series pontoon seating. individual pontoon seats; front. Clark craft offers hundreds of boat plans, design patterns and complete boat kits, and a full line of boat building supplies and accessories for the amateur boatbuilder.. Marine plywood. our range includes as2272 ply bs1088 ply and exterior plywood to as2271. boatcraft stocks a wide range of marine and other plywoods suitable for use.