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
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 pot(not 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 cooking/boiling etc.