I haven't been building for very long, but I always used tape.

I would put a healthy layer of epoxy on both sides of the wing. Join the two wing halfs. Put some 3M clear tape around the wing joint kinda like I'm taping the wing together. I usually let the exopy set up for a 30 minutes to an hour then I remove the tape clean up any residue with denatured alcohal and let it competely cure.