Alright, first of all hello everyone, nice to finally join the forum! So my first post here because of my now one month old DeBuyer Mineral B that I bought following advice I'd gotten here. It's brought me great joy so far and I'd manage a nice coating of non-stick seasoning. Then I filled it up with a kilo of salt, heated it up and cooked prawns on it. 3 hours later, after the salt had cooled down sufficiently I threw it out to find a fine layer of what appears to be rust. -_-.... I mean, salt rusts, sure, but I'd made sure there was no water on the pan before I'd put any prawns in and can things rust in a matter of three hours....maybe 4? Is it rust... it kinda looks glossy blue as well. Bizarre. Explanations anyone? In an unrelated issue I've also discovered my pan has warped a little, I think. I haven't dumped it in room temperature water, or even washed it until it's cooled down quite a bit but I have deglazed it many many times with room temperature water into a rather hot pan. Can that warp a pan? Btw, when I say warp I can't really observe any instability on a flat surface or any indentation visually; but, when I put oil in the pan it settles into a ring against the edge of the pan. Maybe, I'm over reacting. I feel stupid for having perhaps warped the pan, probably should have a read a bit more into it before I plunged half a cup of water into my hot pan. Any help on both matters would be much appreciated!!!!