Picked this up on clearance from Hobby Lobby. It’s a set of hard foam brushes, that looked good enough to use for drybrushing.
This is what I could do with some gear doors on a P-40, I painted a black base, hit it again with some diluted chromate green, then drybrushed with that brush. I haven’t tried it on a cockpit yet, but I think it shows some real promise.

