Stainless steel sinks do NOT rust but may appear to. Traditional orange/red rust marks in a high quality stainless steel sink can almost always be traced to one of three sources:
- Steel wool pads used for cleaning
- Tin coated steel cans or cast iron pots left in the sink while wet
- Iron deposits in the water
Rust stains are not a sign of sink deterioration, they are just simple deposits on the surface of the sink. Scrubbing the stains with a mild cleanser or metal cleaner like Flitz, almost always solves the problem immediately. Be sure to clean in the same direction as the grain lines of the finish.