For best results, thinning may be required. For a Preval sprayer, RustSeal is typically thinned about 30 percent with KBS #1 Thinner. Thin other KBS paints to the figure on their own directions with KBS #1 Thinner or xylene, never lacquer thinner: BlackTop 5 to 10 percent and up to 20, KBS Top Coater 10 to 20 percent for spraying, and DiamondFinish Clear 10 to 15 percent and up to 30.