I'm with the majority here. I don't use wax or vasaline, or anything, I drill a wick hole (unless the hinge is slotted), and I have 10 year old planes still flying with no hinge issues
One thing that ramcharger said however, has caught my attention:
Originally posted by ramcharger
Also, on this plane I made a extra efffort to minimize the gap
When you install CA hinges, deflect the surface MORE than it will move in flight. This will result in a larger gap because the more you deflect the surface, the more hinge will pull out of the wood. You can (and should regardless of it's size) always seal the gap later. Without deflecting the surface, you may end up with a smaller gap, but at what price? Now, every time you move the control surface, the hinge is trying to pull out but can't, resulting in stress on the hinge, the wood, and the servo.