I gessoed over an existing painting - I cannot remember what it was! In any event, it didn't make the cut. The background is 3 colors plus white of acrylic paint then stenciled.
I had no real plan on what this new work would be. Playing with charcoal pencil, I drew a face. The features were developed later in oil paints.
Finished work (18x24)
deciding on hair line
adding the hint of eyelashes made a big difference to her eyes IMO