1. Mix 1 tablespoon of baking soda in 2 cups of water.
2. Rub the baking soda solution on the rust stain using a toothbrush. Baking soda is non-abrasive and will gently lift the rust stain from the stainless steel. It also will not damage the grain of the stainless steel.
3. Rinse and wipe the spot with wet paper towel. You will see the rust on the paper towel.