there are a number of different brand panel adhesives, all functional - it has it's uses, especially for production body shops, but the adhesives use lap joints, think about how much filler you want on your truck, if you're a decent welder you can get by with very little .... my main problem with panel adhesive is it has a very short shelf life once opened, and you really need a new nozzle every use, makes it expensive for a string of jobs over an extended resto
Bill