Air gun is fine for pulling the lugs off, I do it all the time, but you don't want to put them back on the same way. They'll be much harder to remove on the side of the road with just a little lug wrench, could strip the stud or lug nut, and you could help warp the hub and rotor. Just hand tighten them back on and use a torque wrench to get them to 80 in a crisscross patern.