I thought you might want to see what difference a bit of Devlan Mud really makes on a speed-painted model. The two on the left have not had a wash, and the two on the right have. Click on the picture to enlarge it.
I'm not one of those people that think that everything should have wash on it, but when you are trying to crank out a bunch of models, Badab Black and Devlan Mud go a long way towards blending, shading, and hiding mistakes that you simply don't have time to fix.
Speaking of cranking out models, Adepticon is already sold out! WTF??