I imagine you do know but in case you don't. That picture is of the body buck for the first Cobra Daytona coupe designed by Peter Brock. That's Brock on the right in the jacket. They built a total of 6 coupes in the race shop in Venice, Ca.. The Daytona's and Cobras for that manner were aluminum. Faster to shape but slow to weld with a gas torch back in the day. But you can run an aluminum weld bead through the English wheel and crush it. Disappears. Sadly you cant wheel a steel weld.
That is a skill I have a very strong desire to learn. How to build a proper and accurate buck. Ron Covell has buck building classes scheduled this spring and I am going to try my best to attend.