Hammerite Rust Cap high heat spray enamel is a durable, high temperature, self-priming spray enamel. It was developed to withstand constant temperature exposure of 750 to 800 degree Fahrenheit. The finish will withstand intermittent exposure up to 1200 degree Fahrenheit. No priming necessary or recommended. Shake can to loosen agitator ball then shake can vigorously for 2 minutes before usingApply at temperatures above 60 degree FahrenheitSurface to be coated should be no warmer than air temperatureUse steady even back-and-forth motion, holding can about 10 to 12 inch from surface being coatedApply thin, even coats. Several thin coats produce better results than a heavy coatingDepress nozzle completely with each pass, keeping fingertips out of spray