IDK who needs to hear this but stainless steel is a relative term. It still rusts eventually, especially if it gets wet, triply so if it gets salty and wet. If you're making, say, a truck out of bare stainless steel, you should probably put some paint on there.
We were not painting trucks this whole time for purely aesthetic purposes. Sorry, "skipping the paint" does not qualify as "disrupting the auto industry."
@sidereal It's possible to do if done properly, like the DMC Delorean's unpainted stainless-steel finish. Tesla is just a piece of shit company.
@sidereal Specific alloys are designed to withstand certain elements, environments, and stress better than others, say food/brewing industry or marine or automotive; like a DeLorean, bare stainless was the intent. Downside is repairing. With steel you can patch panels, add body filler then paint, but stainless is a whole different beast.
I'm not a metallurgist but have done a fair bit of working with and welding stainless.
Paint fades, get scratched (if deep enough can allow underlying material to oxidize), and does need general maintenance...same as (some) stainless alloys.
@sidereal This reminds me of the bare plywood paneling and other bare wood elements that they started putting on all the new townhouse developments. I lived in Seattle during the period when these were sprouting up like mushrooms. They almost immediately start to look like absolute shit as the wood weathers and ply delaminates. But for the first season on market, they look cool and modern, which allows the developer to make their quick buck. You could walk down the same block and see before and after examples in real time, but they kept going up regardless.
When "modern design" is just euphemism for cheap, thoughtless, mass manufactured crap that will last just about as long as the fad that produced it.