Any experiences with cooking super-acidic food like quinces in enamel cast iron? I've read that it's safe, so this is why I bought my enamel Dutch oven, though not a top brand like Le Creuset or Staub. I followed a recipe to poach the quinces in an enamel D/O for 3 hours...and my new pot's shiny finish has been stripped to matte! Not a good sign from what I've read. My other enamel pieces, used several times, are still shiny.
Now I'm wondering what to use next time I have a pile of quinces. Stainless steel pot?