I can't find anything more than hearsay about this, but I've now encountered the idea several times that Tesla chose or developed an unusual alloy to mitigate oilcanning, a phenomenon where large, flat pieces of sheet metal tend to cup or bow.

Here's some anecdata that is probably the most coherent read I can find on the topic of Cybertruck oilcanning: http://livingstingy.blogspot.com/2023/08/dude-wheres-my-cybe...

Seems the alloy is probably less rust resistant than more common alloys, and also can't take a clearcoat without losing some valuable properties? More hearsay: https://www.reddit.com/r/teslamotors/comments/197sivs/tesla_...