I have some clear plastic that came on a large 4' wide roll. It is probably about 6 mill for thickness and it's kind of stiff. A friend of mine gave me some of it and it works quite well for this job. I have 3 or 4 pieces cut about 6"x24" I use them one after the other, as sometimes the polybrush would stick and start to lift if it was still hot enough to melt to the plastic. By the time I iron down the fourth one, the first one is cold and pops right off the polybrush even if it stuck to the plastic a bit. I've even used it some with the polyspray if need be. It did kind of melt things and leave them somewhat as smooth as the plastic if there was enough material there, but the next coat covers it and the shiny surface goes away. This plastic stuff really helped to keep stubborn pinked edges down. I might have some pics, but they would be in my old PC which is not set up now. Jim Chuk