I read the How To article on here, and it wasn't basic enough. All I want to do is cut a hatch in the top of my US40 behind the firewall to help installing a different engine mount. I've got a roll of ultra coat, and a TopFlight MonoKote Heat Sealing Tool. Not the tiny trim one, 165W thing. It goes from 0 to 3.5 and I got a couple "socks" for it. Can I just cut a square, put it over the hole, and it will seal to the original UltraCoat around the edges when I get it hot enough? Or do I need glue or something? Do I need a heat gun? I tried running the Iron over some of the wrinkles on my trainer, and it didn't do much. I was probably scared I'd melt something. I know this has to be dirt easy, but I need a bit of confidence here guys. If I can get this to work, maybe I'll try and seal my hinge gaps on the plane! Thanks bunches! - Joe