The DU Lounge

...where the made the exterior out of N-304 stainless which doesn't do well with chlorides.
Half the country puts chlorides on the ground in the winter.
Some of those regions, plus more, live near salt water spray.
It leaches nickel & chromium from the matrix. This causes micro & nano cracking compromising tensile strength.
And it exposes more iron to oxidation, aka rust.
Since chromium chloride is purple, nickel chloride is green, & iron oxide is orange, I think a lot of these tryck will have an ugly brown patina in a few years.