So I've been reading up on ceramic coatings, and I have a quick question: From what I've skimmed, it seems that ceramic coatings tend to produce greater heat resistance and (more concerningly in some ways) can work as great insulators.

My questions are:

1. Does the heat-resistance apply to the ceramic laquers being considered? If so, does it perhaps offset the heat-dissipating advantage that having an aluminum body/cover would provide? Or does heat resistance in this context mean resistance from damage/deformation, but not insulation?

2. Does the tendency to work as a good insulator apply to the kind of ceramic laquers being considered? And if so, does the effect on electromagnetic properties of the material bode better or worse for the signal quality of the device, especially once we get to the full-body replacements?