[Nowhere Man]

If those things crash and catch on fire, I bet they will burn hotter than the surface of the sun.

IIRC, I read somewhere a long time ago where the early M-113 APC's had aluminium as armor so when they got hit during the Vietnam War, they burned at a higher temperature and causes a lot more casualties. If they want to make a rustless car, why not stainless steel?

[Little Bill]

Right down to the Tracks. When you look at Soldiers riding in Viet Nam, they are riding on top of the track. The damned things were mine traps and fire traps. An RPG would eat through the side armor like it wasn’t there.

[Clay Moore]

Stainless steel tends to work harden as it moves and crack when you try to use it on car bodies.

There was a company that built aftermarket Jeep CJ bodies out of stainless back in the ‘70’s and they always cracked around the frame /body attachment bolt holes. They were beautiful bit every one I ever saw cracked given some use.

[Figment]

If they want to make a rustless car, why not stainless steel?

Weight and cost. This isn’t about rust prevention, it’s about weight reduction to meet fuel economy