I tried to do my imitation of Frankenthaler. I started with a simple five circle design in thick, black acrylic, then applied very thin coats of red, yellow and black acrylic. Did it work?
This was an experiment to see what a dried acrylic paint undercoat does to overcoats of paints. As expected, it darkened the red. Now I'm wondering if there can be an undercoat that can lighten it.