Use epoxy only if the hinges are hard plastic with a hinge pin.

The "CA type" hinges, the ones that look like a thin piece of plastic laminated with paper on both sides, are made for installation in wooden parts using CA, but not in foam wings.

You can also use Pacer Hinge Glue with pinned hinges into foam structures, and it won't keep the pivot point from binding up.

I'd recommend epoxy. There's a link here somewhere that describes the process.

MinnFlyer, where are you when we need you?