need some input please

Hey Guys & Gals, I'm a newbie & ex-lurker, so I hope for some feedback from the vets. I've done the intro forum, but I'll very briefly summarize - I'm starting a lightweight version of Mike Schneider's venerable Weekender. Probably 5 x 9 on a H-F 1750 lb trailer. Basic & utilitarian. Primarily 5MM sturdi-floor sandwiched over 1x2 & 1x3 framing. However, after spending some time in the foamie forum, I'm thinking of a combo - plied sandwich sides & galley with a foamie front & top. I'd like some opinions on the suitablity of this. Any successful combo's out there?
However, the big item for this forum is the finish - After lurking and reading lots of threads & Mike's composition adhesive tests, I'm pretty well sold on poor mans fiberglass (used bed linen edging out canvas) and using exterior latex as the "glue" rather than TB2. This method has been around for awhile, but not a lot of new info (for or against) the last year or so. So I'm looking for experience, insights, and devil's advocates on both of these topics. I've seen that latex doesn't adhere nearly as well to foam as it does to wood. But for the upper surfaces, how much is enough? Pease help a wandering soul here........ thanks in advance...doug
However, the big item for this forum is the finish - After lurking and reading lots of threads & Mike's composition adhesive tests, I'm pretty well sold on poor mans fiberglass (used bed linen edging out canvas) and using exterior latex as the "glue" rather than TB2. This method has been around for awhile, but not a lot of new info (for or against) the last year or so. So I'm looking for experience, insights, and devil's advocates on both of these topics. I've seen that latex doesn't adhere nearly as well to foam as it does to wood. But for the upper surfaces, how much is enough? Pease help a wandering soul here........ thanks in advance...doug