Bloody, bloody hell. I thought I used a standard, safe household tip last night, in putting a vingegar-soaked pad on the end of my brushed steel finish tap to remove some limescale. The limescale's gone, but the tap has discoloured badly. There are some orangey/brassy bits and some dull grey bits. There's no surface damage in the sense of an obvious removal of a coating, or any residue, it feels clean but looks crap! I'm in a panic - is there anything I can do to rescue it?