ORIGINAL: English Electric
The main question is how to spray an aircraft with a complicated upper camouflage scheme with white undersides.
As already mentioned, an airbrush will make your life much easier and the end result can be spectacular. I used to build small scale plastic models, and I always used an airbrush to spray the camouflage scheme. An airbrush gives you soft demarcation lines between the colors, which you can't really achieve by hand brushing.