I was drawn by the rhythmically dissonant colors of Charles Sims. The way he handles the saturation of the colors feels fresh and otherworldly. Some of the children figures are connected to another metaphysical plane. Later I found out he was consider an Outsider Artist.
There is more information in Harold Speed’s “Oil Painting Techniques and Materials”
Here is a description of his palette:
For occasional use:
Roberson’s medium and turpentine spirit.
Bio from Wikipedia