Posibly ceramic coat, but idk about high temp paint. I either is better then none if the wrap is going to collect moisture (and it will). We coated a header once with high temp paint and wrap WITHOUT getting it wet, but even with good prep the wrap took paint off in some areas.

I could understand getting the wrap wet when putting it on, might be easier to work with. Plus once drivin for a while it will burn off the water. Almost like breaking in a new pair of leather boots with water...