Stupid me, I ran a Dansk “Fjord” polished aluminum bowl through the dishwasher. The detergent reacted with the metal and left it dark and discolored. Tried the old wives’ tale of soaking it in a paste of Cream of Tartar. Didn’t work at all. Found some tips online that “Bar Keeper’s Friend” may work, so I gave that a try. Took a few scrubs with the rough side of a kitchen sponge (didn’t scratch it up too bad), and it looks much better. Not quite good as new (not as reflective as I remember it), but still passable at a future shindig 🙂