I picked up one of the Craftsman Dual-cut saws a few years back, looks like a 6" angle grinder. Very similar to these is it uses 2 counter rotating blades. It's LOUD, & blows chips all over the place, but chops body panels like you were cutting formica. Leaves smooth edges and no heat warping, it's a dream for doing large body panels, esp. if you're chopping donor parts off a wreck. They have a wax lubricant that can be used for cutting softer materials like aluminum to prevent clogging the teeth.

1956 GMC 370 dump " 'Tater "
1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI

I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P