Check all the usual rust spots and poke around with a screwdriver to find any surprise holes that may or may not break it for you. Top corners of the inner front fender wells, bottom of the a pillar aka jack point, above the exhaust heat shield on the passenger floor, usual rear battery tray/valance, every inch of both side rear fender wells....
BTW I looked today for sunroof bits, all I have left is the top crank winding mechanism. No cables or rails or anything. Not sure if thats going to help you. Let me know.