When using aerosol spray paint with temperature resistance, say 500 degF, don't you need to heat the item you have painted to actually activate the ceramic portion of the solids................until then the fresh paint is susceptible to ruin by any liquid like gasoline, cleaning fluids, oil, grease and the like? That has been my experience with Plastikote engine paint on 2 stroke engines, spilling gasoline prior to start. However after the first heat cycle, and it doesn't take much, the aerosol engine paint is cured and resistant to fluids/solvents.