This step is the quickest of all. After letting the dead layer dry for a couple days, I go over the skin with a thin glaze of burnt sienna. I allow the pigment to be just a bit more opaque to give certain areas like the nose and ears a deeper redish hue. At this point it's starting to look really ugly, but the thing to keep in mind is that this glaze is providing what will essentially be my shadow colors for the skin, and everything else will be built up lighter and more opaquely from it.
Next Step: Final Overpainting