 [ Symptoms ] i accidently burnt my aluminium pot containing h20 on gas i clean it but it has a purple shine is it safe to use now i forgot to switch off the gas stove on which i left water boiling in an aliminium or steel potnot sure of wch metal it exactly is pot for 30 35 minutes and when i entered kitchen it was full of smoke i cleaned the pot and black spots got removed but there is slight purple shine at the bottom is it safe to use that burnt pot now for cookingboiling etc [ Disease ] hi if its purple the its stainless steel so just use it and when you can get at with some good old scouring power it will bring it back good luck