I experimented with my poor non-drying August Dr. Sketchy paintings on vinyl.
I tried the Japan Drier which seemed to make the paint even gooier.
I talked to an oil painter at Jerry's and then bought Gamblin quick dry white and made a few test vinyls.
I squirted these green and black and white nudes with the Sennelier oil pastel drying spray and they melted.
I decided that the oil-based paint markers were not going to work so I did a big test sheet with fabric markers and I bought some white acrylic fabric paint. I'm going to wash the test panel and see what happens.