Header coatings, how necessary?

trebling,
1st question: Do you have a daily driver? This car will be driven. Not just raced or showed.
2nd question: Do you live in a dry climate? It's been dry as a powder house around here for years.
3rd question: Do you live close to a body of water? Used to. It dried up.
4th question: Does your car sleep in an enclosed garage at night? Yes.

I'm not trying to be funny, but I know the type of climate you're faced with and I don't have those problems. Here in Wichita Falls we are now in stage 4 water restrictions. So moisture hasn't been a real big problem in years. However, I've had street cars with ceramic and Jet Hot coatings for years that were subjected to some pretty crazy conditions and some similar to yours and I would still recommend these coatings vs. paint. Painting does protect the outer surface, but what about the inside? These coatings protect the inside and outside of the header.