What is the best temperature for model painting?

Usually, the hotter the weather, the better. In fact, not only the temperature, but also the temperature is not very important. Is to control the air pressure when you draw. That's all that matters. I suggest you adjust the air pressure to 15psi. Also, the humidity in the air should be low. It is best not to spray paint after rain. Of course, don't spray when it rains!