Every artist has their own technique and this technique is the one I prefer. In short, I use pigments (or crushed pastels) then layers of oils, then layers (and details) of acrylic, then more pigments to color one piece. It's a constant flow of media back and forth. The unifying element to all these mediums is Krylon Crystal Clear FLAT. It allows coverage of all mediums and has a soft tooth when dry.
The process within the pictures below are the pigment portion. This piece has approx four layers of pigment. It doesn't look like much, but in the end it will all make sense.
the first layers of pigment.
painting the darker areas first.
better guidance when laying down the body color on a dappled grey.
Dappled are applied later.