Okay, so this guy obviously isn't a daemonette.. but he was as close as I could find from what I had laying about.
This is a quick step by step I whipped up to help a mate get his army painted.
One thing that's worth noting is that the key to this technique, is the undercoat.
I have sprayed black all over. Then sprayed at aprox 45 degrees with gray before a final zenithal (90 degrees) coat with white.
All told, this took me only a couple of minutes to paint, including dry time!