Muffler system rust & hole in manifold

martin_csr wrote: Yes, that's what I'm worried about. Other than the rusty spots at the manifold, the chrome looks pretty good. I'd like to nip this in the bud before it gets too far gone. In addition to the rust, the insides are probably coated with carbon, so it's probably going to be a pain to clean it up before I can do any kind of treatment. I'm thinking of using bristle brushes & various cleaners to scour the inside, then maybe try an Evaporust treatment, then paint it with bar-b-que grille paint. Or skip the rust-chem treatment & just use the paint. I've had good luck coating the back side of chrome steel parts to deter rust, so maybe this will work on the muffler system as well. ???