No more like a wolverine, but it was a hellatious process. I came to the conclusions that, a) You have to have done it before, and b) You need their "hydro{something}" tool, whatever that is, and all its attachments. I mounted a putty knife to a sawzall and it was able to cut the glue, but I didn't know where glue ended and metal/plastic frame began, and my blade was thick and wouldn't bend 45 degrees, so I tore it all up. In the trash with all the pano fixin's. My parts car was a convertible.
I've now cut the body shell into pieces to sell to a metal recycler. My rebuilder is finally finished and is so fine.
But exactly as I finished of course I started getting a "BMS reports voltage isolation warning" and "Car may not restart." It was a nightmare error, but I managed to find it and fix it, with Ingineer's input.
On the mileage question; I don't consider the miles, wear on the shell. It's not like a plane which gets metal fatigue in a reasonable lifetime. Miles're wear on the mechanical and electronic systems. That's my answer. We can fix the VIN.