I have a co-worker that has a few Lotus 7's all aluminum body cars.
They are pretty rare cars, one of them he bought was wrecked hard, but had racing pedigree, his neighbor had just retired, and re-built over 90% of that aluminum body for him, it turned out beautiful, no hiding bodywork on polished bare aluminum.
The guy is a true craftsman.
I said to my co-worker, that must have cost you a fortune, he said no, he just had to keep the refrigerator full of beer for him.
The guy was retired, just looking for something to do.
Google Lotus 7 if you want to see compound curves.