Tesla forgot to make the…
Tesla forgot to make the stainless steel passive. You dip the stuff into an acid bath, this dissolves surface iron particles.
I have a boat. That is used in saltwater. I learned the difference in “marine grade stainless steel” and “Home Depot stainless steel”. One is passivated, the other isn’t. Therefore one leaves orange stains, the other not so much.
The lesser grade doesn’t rust like regular steel, it just gets specs of surface rust. And leaves orange streaks on the gel coat.