ORIGINAL: mmattockx
Georgia&Canada the thinned white glue pictured would it work and what about the H2Oin the thinned glue warping the outer skin..on the subject of Polyspan is it heat activated adhesive?
Can't comment on the water warping the wing (I don't think it will be an issue on a foam core wing), but the polyspan can be stuck down with either Balsarite or nitrate dope. If you use the Balsarite, you put a couple of coats on the airframe and then iron it down like film. Follow that with a coat of nitrate dope around the edges to really seal it down, then shrink with a heat gun like film. When shrunk, seal with a couple coats of nitrate dope and finish with either butyrate dope or your favorite paint. If you use nitrate dope, you put it on like silkspan (except dry, not wet) with a couple coats of nitrate dope on the airframe first, then nitrate dope to stick the edges down. Then shrink and seal as above. I have used both methods and either works fine. I preferred using dope to stick it down, but it was not a big deal either way.
Mark