That is true spraypaint is alot cheaper, but with an airbrush you can mix paints to get the color your looking for, spraypiant is what you see what you get.
In the long run your going to spend just a little less on spraypaint than an airbursh and a set of paints to Paint a whole Boba from head to toe.
Plus you can use the airbrush for other projects, most of my paint cans from my first attept at Fett was waisted.