I have been smoking on a Brinkmann Limited Edition Trailmaster. After about a few cooks I noticed the fire box has developed quite a bit of rust. I have invested a little money on this smoker w/ mods such as tuning and baffle plate, charcoal box, gasket for cooking chamber so I'm trying to preserve it as long as possible. Any thoughts on what I can do to get the rust out and protect it from rusting? Any good high temp paint out there safe to use?