exhaust manifold coating/Paint?????

I have done a lot of different exhaust manifolds and headers over the years, with canned coatings, spray and other. None but None have ever lasted for very long. On the other hand the Ceramic coating on my exhaust manifolds has lasted 10 years so far. I had them done by Jet hot coatings and I admit I had to send them back for a redo under warranty because they started to rust in the deep pore areas due to to the Houston humidity.
But since I had the new A/C garage built and the car stays in climate controlled area they have done REALLY WELL! If I were you I would spend the EXTRA $$$ to have CudaChick do them for you, I bet you will be happier with them in the long run ! just my 2cents and a note! When doing the exhaust manifolds smooth out the surface as much as you can before having them coated , remove or cover heavy pored areas. There are some products you can use to fill the deep pore areas in with.
The smoother they are the better they are. Especially if you live where the Humidity is high, moisture gets in the pore areas and will show signs of rusting.
Of course it is your $$$ and you can certainly choose to do it however you see fit. I know that some canned products have came a long way in technology in the past few years also. By the way I do not get any $$$ from CudaChick for recommending her and her powder coating or ceramic coating business. But I have seen some of the work from her and it is TOP NOTCH WORK!