Hello guys newbie here. I recently built my first forge and am now to the point of coating the Inswool with satanite. I put my first coat of satanite on and let it dry for a couple hours and then fired up the forge for about 20 seconds. It seemed to have burnt it and left a black mark under the burners. It was real hard then so I decided to put another coat on. I let it dry for about an hour with my propane heater next to it until it was dry to the touch. I then ran the forge for about 15 seconds. It seems to have done the same thing. Am I not letting it dry long enough before firing up the fo