I have my Maule up for sale and the info and photos are listed on Barnstormers. 1637 hrs TT Airframe and Engine, Annual 6/14, Always hangared, second owner since new. VG's, Gap Seals, Sealed Struts,...
You are both right! True, epoxy will not adhere well to a flat sheet of polyester film, however the weave of fabric polyester creates keyways the epoxy can become interlocked into, creating a mechanical bond versus a molecular bond. Epoxy like West System which is used in boats, windmill blades, aircraft, does have some flexibility. Looks like a good beta test!