ORIGINAL: Campy
Considering it is just an aileron, have you considered cutting the old one out and replacing it ? You would need to relocate the hinges (no biggy) and inlet the aileron for the torque rod. The bottom line is that you would know the aileron AND the hinges are OK. The amount of work involved either way is going to be about the same.
Best advise!! The other methods will work to some extent but it is so easy to replace the aileron!!