3m77 was reformulated within the last year or 2 and will attack foam if you glom it on too thickly. 3m78 is, I believe, foam friendly. Regardless, test on scrap.

Dave Brown's sorghum works very well, as does Gorilla Glue (polyurethane).
The Gorilla glue is, unlike the others, not a contact adhesive. There's a different technique. Squeegee a thin coat on your wing skins and core, assemble the shucks/skin/ core/ skin/ shuck, and pile on a bunch of books. The old "World Books" in the attic come in handy here. It's a real advantage they have over Microsoft Encarta on CD Rom. :-)