I ended up painting some of the warm colors into the lead white mixture when it was wet, which is not what I was supposed to do. If I try it again I'll use a drying solvent.
Here are a few progress images and the final, which I was pretty happy with. Why did I attempt this? Because I visited a museum a couple weeks ago and noticed that all the paintings I really liked had the red-green complimentary color scheme going on, and the green was very visible in the shadows.
I used a photo for my painting but this method was used extensively in the 16th and 17th centuries from life. Yeah- they didn't have camera back then. :)