In this section, I want to describe the hardware and materials I use for priming the parts.
First of all you need a air compressor. Good news ! You already have one since you needed one for the plane building. Remember ?
Well if you were smart, you bought one with at least 100 liter barrel. That way, you won't have to stop all the time when spray painting for the compressor to recharge.
Secondly you need a spray paint gun. Below you can see a picture of my gun.
Optionally for corrosion protection but I believe mandatory for painting is a water/oil filter on your compressor. It's a, expensive piece of equipment but getting dry clean air when painting is an absolute must.
The transparant bubble below will collect the water that get's extracted from the air. The little white foamy cylinder in the middle is the oil filter. Air goes it from the left and comes out right. So you just connect this to your compressor. The gauge on top allows to regulate the output pressure. The little screw in the bottom has to be loosened from time to time to release the trapped water.