I think he is looking for something that will handle a little more continuous run time... he drives his car for 5-6 hrs. at 75-80 MPH... hot...cold... rain...shine..
I have to admit, I know very little about what engine paint will hold up over time. If the stuff on mine is of poor quality, let me know. The car will not be back on the road till next year , so I have time to do it over.