Anyone Jet-Hot coated their intake?

I have, and there are gains there, but it's pricey and the $/HP gain are pretty high. They should to coat the inside and outside of all the lower passages, especially the water and EGR passages.
 
I would just have a body shop clear it with high temp clear. I'm assuming that you just want to keep it clean. Jet hot would probably hurt performance cause you are keeping the heat in and kinda insulating the intake so it cant cool. You can have the upper and lower extrude honed for more performance and better flow
 
Jet-Hot coating would keep the heat out if you did not run hot coolant through the EGR spacer guys - that is why you coat the lower inside and out. MM&FF or 5.0 coated an upper and showed gains a few years back.