Thank you all for your advice. Reporting back my results.
I preheated the parts, tools, primer/reducer to room temperature. I also put a heater directly in front of the air intake of the compressor. My compressor has a small tank, so it had to run while I was working.
It sprayed fine. The result is not great, but I think is acceptable. The main problem is there is a pattern of little tiny dots of paint as opposed to uniform layer. The result is more pronounced the further away I held the spray gun from the parts. If the gun is really close to a part, the paint applies uniformly, as it is liquid enough to smooth out the pattern. When the gun is held further away, as I had to do with really light parts such as elevator rib halves, there is this pattern of dots. I assume the atomized paint hardens too much while flying through cold air before it hits the parts.
It doesn’t bother me too much, and I still get the parts fully covered with paint. It just looks kind of like a corroded piece of aluminum, so I wonder if it will be harder to detect actual corrosion if any develops.