I never would have thought but it seems water is the key! I would recommend using 2000 grit sandpaper before heating up the plastic. Maybe a propane torch would work better that a heat gun but I'm no sure. I'm definitely testing this tomorrow afternoon on some old plastics I have . So, when the plastic gets real good and shiny immediately pour water of the entire section and it will stay that way. It looks legit in the video and I never heard of anyone doing it this way before. This does away with buffing so takes all the work out of it. https://youtu.be/yAu_BYXGR1Y