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Some uncoated ferrous metal is touching this.
Yeah bottom of a cast iron pan, old cutlery, tin of beans etc.
Found out the hard way proper knives are obviously steel, and someone decided to wash them all, then leave in a pile on the wood behind the drying rack. All the knives turned orange, wood turned black. Thanks for that one lol. THat was in old kitchen that only had a cheap 'danish oil' covering. Current kitchen has various things soaked into it, mostly tongue oil then finished with Osmo clear, works well, even recycling cans left on it haven't hurt it yet
BrickMan
withered_preacher
We periodically get these black stains on our maple countertop and I can’t figure out what’s doing it. Any ideas? I think it must be some kind of reaction to either metal or food, but don’t know for sure. I can get them mostly off with a mix of salt and lemon juice, but I’d rather not get them in the first place.