The first time I used CA hinges I glued them into the control surface, waited for that to cure, then put CA onto the hinges and tried to attach the control surface to the wing. The CA cured before I could get the control surface in place and I was doomed.

Now I get the hinges and control suface all in place and apply the CA to the exposed hinge in the gap. I use thin CA and a wooden Q-tip broken to create a small point. I dip the stick into the CA bottle and apply a drop of CA to the hinge. I do about 4 drops on each side. I've had great luck with this method.