Header coatings, how necessary?

I used to get the Jet Hot coated headers but it's a waist of money where I live. They lasted about 1 1/2 years before they rusted badly. It really pissed me off because I paid so much for the coating. I called Jet Hot and told them off. They recoated them for me (for free, had to pay shipping) but they only last another year. I live in south Texas about 1/4 mile from the ocean.
Now that I'm older and wiser I use Eastwood's Factory Gray High Temp Coating spray. Here's a pic after a year in my Cuda. They've turned a little white but almost no rust at all. Of course this is on the 360 Mag Truck manifold. I won't ever pay for coated headers again...it's just not worth it where I live. If you live in a very dry climate they should last a lot longer but for $150 it should last 10-15 years. The can of spray costs around 10 bucks and will do 2 sets of headers/manifolds.

$10 VS $150...your call

Treblig