I was looking for a way to speed up my painting and decided to try airbrushing contrast. As you can see, the result is fairly decent considering the time spent. What you see here is a zenithal priming (black, grey then white) followed by airbrushed skeleton horde (with about 20% thinner in it).
Yeah, it actually works kinda like a glaze if you airbrush a thin layer, or you can do like you did, spray a bit thicker and it’ll still do the contrast effect. But that doesn’t work too well with some colors