Has anyone used Zybar exhaust coating

[custom10nut]

Has anyone here used this Zybar Exhaust coating?
How well does it work?
Does it stay on the manifold/header once it’s applied?
How durable is it?
Does it mitigate the under hood heat as it claims? (This would be my first concern)
I know a lot of a product’s effectiveness depends on the prep work done before it’s applied.
My plan is to media blast and prep spray beforehand.
justifying the cost is my concern.
Lastly, is one 4 oz can enough to coat a set of headers?
If it’s a good product, Great, but if it’s junk then I won’t bother.
Thanks in advance