Paint update of sorts...
In the regular gas grill section I posted about a Silver A I restored in which I first painted with high-heat black and let it cure for a full week. I was not at all happy with the remnants of the original texturing that survived all my wire brushing. Rather than start over I decided to try my idea and paint over with regular temperature texture paint. (I have never seen any high heat texture paint.) After letting that cure for a few days I then painted again with high heat black letting that cure for yet another week.
When I did over an hour of burn-off including a half hour or more at full power (+600 degrees) I did not notice any bubbling or other issues. Not sure this would work on a firebox or a more powerful grill. It DOES give me hope that I could do something similar on Q grills with high heat primer first, then all the colorful engine paints I bought, and finally a coast of high heat clear.
I will update whenever I can finally do a Q in this manner. I will also test it thoroughly.
Jon, how's the textured paint holding up?