Hello, just picked up a genesis on cl after looking for a long time and it was rougher than I originally thought.Needs a good cleaning, its got a few rust spots on the stainless and inside it looks like alot of oxidation going on and just alot of grease residue. Burners work fine but need a crossover tube and of course flavor bars. Just looking for some suggestions on attacking the rust on the stainless surface and cleaning the inside firebox. It's a 2008 model with a side burner, hope I didn't screw up, thanks!!