Dudley dix yacht design. faq – stitch & glue dinghies. this is because polyester resin shrinks as it cures and it tries to shrink itself off the plywood.. Previous post > i want to build a low cost stitch and glue and have been given polyester > resin and cloth free. my question is how do i use these items instead of. Should one fibreglass using epoxy or polyester resin over wood. in this case it was to join the plywood panels of a stitch and glue boat. first, woven.