Agreed. That is why that West System G-Flex looks attractive. There are two types of G-Flex - one that is thick and one that is thin, viscosity wise. Plus G-Flex is specifically designed for plastic and other "flexing" surfaces. I may go with the thick DevCon for the initial layers (since that is the Hunter recommended product), and then use the thinner G-Flex for the final "thin/smooth" layers.