It works great! It creates a film like a sheet of plastic that is great for molding carbon fiber spoiler brackets and fiberglass airsoft parts. All I use is a artist brush and you don't have to worrie about streak marks because it evens out and creates a uniform film. I also experimented spraying it on a larger mold and it works great if you know haow to spray so it doesn't build up or clog. When spraying do one to two passes at a time and let it dry before adding another pass. also between coats you should wax it carefully not to damage the film to ad extra release. I wax before applying and after 3 build up coats I wax again and coat over it. you can sumerger the mold in hot water so the film just desintegrates and your parts releases super easily. NOte: Try not appling on a humid environment because it would cause the film to bubble up and create air pockets that would make for an uneven furface. Also let dry after each coat completely before applying another so the film doesn't get damage and clog up.I love this is just a bit expensive though.