Del look up videos on stabalizing wood. The resins for vacuum use are different to the Minwax stuff. They are drawn into the woods pores after the air has been sucked out under vacuum(submerged under the resin). Normal air pressure is then alowed back into the chamber and it is then, under air pressure, that the fliud is drawn into the pores.
I've got a bit of experience with the process. Unfortunately it wouldn't be of any benefit to flight arrows. As Pat says all it will do is add weight without increasing stiffness.