the invention includes processes and products made by the processes . the processes include making a two - part mold having semi - cylindrical openings for the paddle shaft so that the paddle blade may be molded and co - cured directly on the paddle shaft . the mold surfaces correspond to the ultimate outer mold line of the paddle , and also are designed to express liquid resin from the centerline of the paddle outward toward its edges as the mold closes or to fuse and consolidate thermoplastic resin such as polypropylene on glass fiber . the mold closing and heating schedule is designed to partially cure the resin so that it flows outward through the reinforcing fiber at a controlled rate , preventing resin starvation of the fiber reinforcement and ensuring complete expulsion of any air bubbles in the reinforcing fiber . the mold is opened and the paddle is removed from the mold for trimming by a high speed cnc router to produce a paddle that conforms exactly to the desired peripheral shape .