Hi, I have not had a boat since 1993 so I cannot give you advise on products or names. the way you describe it you
have a double chine dinghy. if it s got a fillet piece of wood along the join (chine) strip it off, make sure it's perfectly dry. make another and replace using epoxy
glue. if the two pieces of ply just join get them dry and clean cover with glass fibre matt and epoxy, make
sure you use a roller to remove air bubbles
DO NOT use polyester resin. why: water will get behind it and will not bond to the ply
happy sailing
john, July 2010