Brian (MartinSr) has a thread he posted that stress tested welds and panel adhesive in a pull test using a frame machine.
http://www.67-72chevytrucks.com/vboard/showthread.php?t=241030Welds and adhesive were used on the same test parts to see which would fail first. In all cases, the welds pulled apart before the adhesive. Does it have it's uses? sure does! But these seams will require an offset flange, and yes, ghost lines don't care how you put the panel together. So you need to PLAN where you can make a seam using this product that body features will help to hide it. As I said in the other thread, put a seam where it doesn't belong using a flanged/offset seam, and it will show, via welding or panel adhesive. Look at the OEM's now using adhesives. They are used at the edges of a panel where a seam does not overlap, or is covered by seam sealer (think roof edge seam) or hidden by plastic bumpers. They DON'T use the stuff to seam down through the middle of a large panel because chances are pretty good that it will show.. Food for thought....