The Polyfiber manual suggested that small runs or imperfections in the polybrush could be fixed with a sheet of teflon under the iron to spread out the sharp spots in the iron shoe and reduce tracks. I tried the technique on a few little runs and had good results. I also sprayed the next coat of Polybrush. I haven’t been taking a lot of pictures, in part because I’ve been getting out of the hangar right after spraying. The respirator starts to get uncomfortable after an hour.