George, I wouldn't leave those muffs and pipes bare metal. Like Jack says, they get so hot, they will rust up quickly. I bought a stainless steel exhaust set years ago, and even that will rust eventually. As for the chrome tips, you should be able to use chemical paint stripper get the black off back to where you want it. Part of the reason the paint is there, though, is to cover the transition from plated to unplated metal. If rust gets started on the unplated metal, it will work it's way under the plating and peel it off.
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