The hull is tack-welded together with ca glue. check the alignment of the bottom, it should be even with the bottom of the sides. make adjustments accordingly.. Marine resin – premium marine resin including polyester resin, vinylester resin, epoxy resin, and epoxy glue for use in fiberglass gelcoat repair. Sewing & fabric. choosing a sewing machine. it’s good to know how to use a needle and thread to hand-stitch something, but if you’re interested in taking up.