I've not used it but seen it used and the claims made for ceramic coating.
I feel that it would be ok to use in this situation, but that's based on reasoning that the claims made for it are not supported to any realistic degree.
It seems to be highly resilient when used in high heat applications, also resistance to corrosion seems very good too. So, desirable qualities which are certainly attractive. Seems easy to keep clean as well.
It's the retaining heat part I find highly dubious, certainly in reflection when heat directly approaches the ceramic coating seems to have some merit, as in protection of the components it's placed on by preventing some level of heat going in past the coating.
But heat coming out from a mass (the castings) is radiant, the claims at best appear very tenuous. It just looks as if they've found it works as a coating on exhaust systems both for resilience and longevity, with heat retention as pure marketing BS.
saying things like "up to 30% improvement in heat reduction " without supporting empirical data just doesn't add up to much at all.
It's more of the ilk of "a bloke that runs racing cars says it's ok" type of promotion.
One UK based ceramic coater has got something like "applied with top of the range electronic machinery "
which is a bit like an Essex car dealer selling a "top-a-the-range" ford cortina to the local trade's union shop steward.
Well, you get the idea. I'll get off my ceramic coated soap box now.
To me, if it stays cleaner in use it would most likely offer better cooling if you compare it to many air cooled bike engines that are difficult to clean between the fins and the sump area being exposed to so much road filth.