I was putting in a new headliner today and had everything out (bare metal inside on roof), then had to go pick up my niece from school, anyways, it started raining and we noticed that the last time someone replaced the headliner they used a screw that was too long and went through the crossbar and the roof panel. We could see daylight through the roof! I'm going to have the roof rack and other stuff taken off and holes filled before painting this summer, but need to do something to fix it until then. What's the best way to fill a hole the size of a screw so I won't end up with a wet new headliner and rust? BTW it will have to endure the first half of the AZ summer so anything that melts is out of the picture, or will have to be replaced come hot summer. Oh, and I don't have access to a welder or the know-how to use it. Please help. Thanks.