I have had a stainless steel fridge in the pool house for 9 months. I noticed today that is covered in brown spots. I scrubbed it off with vinegar but it seems that it has etched the surface! The only thing that has changed is a week ago I brought in a 25 pound bucket of calcium hardness. I used it all over a few days and the lid was kept on it.
Could that chemical have done this to the stainless steel?
Could that chemical have done this to the stainless steel?