Mask. No IV.
Post op pain control is not usually too bad, so I might not do much for this. But if you want, you can do a tylenol suppository, or even a small amount of nasal fentanyl.
Due to the recent thread on an airway fire that severely burned a child, I would make extra precautions if there was going to be electrocautery involved, such as what others have suggested about moving the flammable material (mask) farther away when I lift it off. Now I might even have a blue towel doused in water in a little basin next to me.