I spray it - but I thin it a bit more, and use a fairly large airbrush tip (not sure the measurement), and clean the brush after each use. Works good, but I usually don't mess with it until I have at least 3 projects ready for finish coat --- just not going to bother with cleaning for each item (unless it's large, in which case pay no attention to the previous )
So, maybe 40/60 (more filtered water than acrylic), + large nozzle, + about 40 psi