Mark, (I am laughing as I type...) RIGHT ON THE MONEY!
OP didn't ask WHAT they were , just IF there were,..........
Like using a cloth that is wet for a heat sink,
Tacking at opposite ends to let the weld cool to put your hand on the tack,
I'm sure the body guys will chime in with ideas, too.
When I ran a restoration shop, we replaced both quarters on a 1963 Thunderbird, door seam to taillight panel.
My body guy who was VERY good, used the structural adhesive designed to do that.
NO warpage, extremely good strength, AND WATERPROOF on the back seam.
Probably BETTER than new!!!
Your Pal, Gary
I saw NO downside....