The surface rust I am seeing on that sheet metal is more to do with humidity than ingress of water. You will find that all cars will have that amount of surface rust regardless of whether there is a leak or not. To show a leak you will find that there should be a very dark brown patch of rust that is causing the metal to look like it is "raised" in a localised spot.Here is the water damage. I found water from the windshield also. View attachment 54299View attachment 54302View attachment 54303View attachment 54304View attachment 54300View attachment 54301