Spraying the dye was a lot like applying spray paint. We held the sprayer about 8-10 inches from the panel and sprayed on two light coats at a time in a crosshatch pattern. Each set of coats should be allowed to set up for 15 minutes before another set is applied. Two coats of material should be enough if you're revitalizing an original color. If you're changing colors, you might need to continue adding coats until the color is solid.