John’s later years found him not only prolific, but also experimenting in a variety of styles and mediums. His abstract work began to show a greater Mexican influences with the use of verticles and blacks. He worked on several series of monoprints and refined his duco enamels to show a bright gloss. Most of John’s later work is small and refined. He continued his pursuit of vertical arrangements, suggesting a line of individuals, sometimes welcoming, sometimes threatening. He directly applied duco and gained incredible variation and stippling that sometimes resembled pointillism. Despite a thick impasto, the abstracts play with the subtleties of greys, textures and multi-layering.