There have been several such methods of fiberglass construction that have proven to be less than advertised or not suited to the production of one boat. factory made fiberglass boats utilize a female mold with laminates made of sprayed resin and chopped glass fibers or, in more expensive boats, hand laid fiberglass and polyester resin.. Ez skiff boat kit. i designed the ez skiff after a fishing trip with my three boys in our 8′ pram. one of the younger boys had a fish on in the back when the oldest boy exhuberantly jumped to his feet to net the fish and i ended up white knuckling the gunwales trying to keep the boat upright and everybody in it.. Designs for one-off fiberglass construction. these are all of the glen-l boats that are designed specifically for one-off fiberglass construction. some can also be built with other methods and if so, will be specified in the design description..