Has anyone had any experience with the clear POR-15? I am getting ready to start a rustectomy on my blazer. I have been toying with the idea of spraying all the sheet metal with clear POR-15 before I paint. I figure if this stuff really works, my blazer should last through the apocalypse. I want to fix this right the first time, and I want it to be the only time I have to do it. Thanks for the help.