i got to bondo up some rust holes on my truck.. what do you guys think of using jb weld to hold the screen to the body panels??..

 

Bondo isn't really meant for rust holes. I think the JB weld would eventually break loose from the sheet metal. I've had to work through bondo'd rust holes before and its agrivating to say the least, especially when theres screen mesh stuffed in there. Your best bet would be welding in small patch panels, or panel replacement