when the incidental rust is caused by iron powder, etc., or the situation is not too serious, sponge or cloth can be wiped with neutral cleaning agent or soapy water to easily remove the rust. Then rinse it with clear water, and be careful not to leave the washing liquid on it. If it is stubborn, you can grind it back and forth with sandpaper or stainless steel brush, and then clean it with cleaning liquid.
in coastal areas, stainless steel will also produce red rust in a short time, and the method is the same as above.