Use a siphon-type spray gun (the cheap ones) not the HVLP (high volume-low pressure) type that uses up a lot of air. Once you have the paint and hardener mixed properly, dilute the paint about 30% with some kind of thinner, either Naptha or Mineral Spirits if you're using the Harbor Freight tractor enamel. It will dry to the touch in about 2 to 3 hours. Try to paint in a dust-free environment to keep the paint from looking like it has a fur coat after it dries. I've had pretty good luck making a field-expedient spray booth out of PVC pipe and heavy plastic drop cloths to keep the wind and dust at bay. Lightly spraying the area down with a water hose before painting also helps in the dust control dapartment.
