Header coatings, how necessary?

Jet Hot supposedly had some company changes over the years and some years of coatings weren't too good. That's from the mouth of the Jet Hot rep in OKC. I had bought my car with the headers already there, rusted. I pulled them and took them to these guys in OKC. I was planning on having to pay to ge tthe headers coated again, but the guy said they do TTi's headers so they are covered under Jet Hot's lifetime warranty, even though I did not purchase them originally. I haven't run the newly coated headers yet, but I hop they last. It would have cost $350.

http://www.forabodiesonly.com/mopar/showthread.php?t=226094