4 years old and needing a better than average cleaning. I have every electric brush and dremel known to man so its time to get in there and touch er up. Whats the usual method and stuff you guys use? Is the old type smear on stove paint good for rust protection on these sheet metal things or is there something better? I realize the spray option is best for some places but what about the flats and easy to reach stuff. Would a can of BBQ black do as well? No 2 part epoxy stuff need apply, been there done that with enough cars, I want the simple route.