I took all the firebrick out of my Quadrafire 7100 tonight to give it a good cleaning.Its been sitting a couple years and want to check the blower under the firebox..The fire box has surface rust on the bottom.I vacuumed everything good and took a screwdriver and scraped it good to get the loose stuff off.I dont have a wire brush. Can this be painted before I put the firebrick back in or should it be painted? If so what do you suggest I use? Any help would be appreciated before I put it back together.