Never rub Stainless or Chrome with carbon steel anything (carbon steel brush, even sandpaper or grinding wheels after using on steel), the chromium picks up carbon molecules and will begin to rust. Don't believe it? Lay a piece of mild steel and stainless outside for a month in contact with each other, you will find rust developing at the point of contact and the stainless will continue to rust there even after separation. Wade is right, polish off the rust and keep it protected from the air. You can slow it way down, but the rust will win in the end eventually.
