Too much heat

PPG concept best they produce paint jobber assured me it would hang on especially with epoxy primer And it is performing well all except those two spots about 2" around. Powder coating for heat has limited colors. did the ex man. in gray. holding up well. Been looking cant find any one to powder coat for heat to match engine color. Had another paint jobber tell me that engine paint is a misnomer that it all burns off the only true engine paint is the paint with ceramic in it. The term "engine paint" is just for color matching. These engines really don't get that hot except for ex man. and I guess those two areas on the intake,