Hi. Odd things with two separate Le Creuset pieces.
On a round dutch oven, about 5 years old. the gloss finish from the inside of the lid has...evaporated, leaving a rough surface. It has been used primarily to cook risotto and lots of Indian rice dishes (think powerful spices like turmeric.) It's concerning that the glossy finish is not there anymore. My guess is I've ingested this bit by bit over the years, not a good thought. (The inside of the pot still has the glossy finish.) Maybe the heat from the steam has done this eating away?
And then on a 8 QT steel + enamel stock pot, only used for pasta. Where I usually fill the water up to...there is a definitive line. Below the line the color of the enamel is lighter and the texture is not as smooth. Above the line the color is the original tint, and is much smoother.