Touched up priming on HS spars … Primer was a bit thick and left a ridge; sanded and reprimed bare metal. ~20 PSI at the gun entry did a better job of misting the primer. Used about 1/3 of a quart so far. Trolled youtube for how-tos on spray guns; found a bunch of heavily tatooed guys that really knew their stuff for auto painting ...works good for airplanes, too (less the tatoos!)