Door jamb area on the left is without film, while the right side is with XPEL Stealth. Car is fully covered bumper to bumper. So if you think that Zaino is not safe (as far as discoloring the film), even though their tech department recommended either the z6 or z8 as being completely safe. What other product has been found to be OK. I realize that you guys have your own, but is there another one also found to be acceptable?