For light surface rust you don't want to get too aggresive. I finde Corrosion X to be excellent. Wipe down with a patch saturated in it, and let it sit a few hours and then wipe off with a clean patch (I use 12 ga cleaning patch's). Wipe easily, not hard. If that doesn't do it, saturate again and let stand another few hours then wipe off "lightly" with bronze wool, making sure there is plenty of the corrosion X on the finish. Clean off with any good cleaner or denatured alcohol and if O.K. put a coat of Rennasiance wax on it.