Hahaha. Sorry I didn't know what to answer.. No I just use the regular brushes from photoshop, or adjust them..
For example for airbrushing like for the skin, I set hardness to 0%, spacing to 25% put a check on other dynamics, shape dynamics, airbrushing, and smoothing. I change the opacity and flow of the brush from time to time to change the strength of the color.
hm, I'm trying to do the same but only in vain! my painting becomes very blurry if I remove the hardness and I'm trying to figure out how you managed to balance different colors, e.g. her skin, the areas around the nose, you used different colors but how did you balance them well?