Plan on painting my 1967-- 350 Chevy (freshly rebuilt)before installing, Using Plasti-Kote -- Chevy Orange Paint!I was told to give it 3 light coats & when fully dried then to give it 2-3 coats of (engine)Plasti - Kote Clear Coat !! Is this highly recommended?? Will it stand up to the extreme heat & thousands of miles use etc. Need to know advatages & disadvantages in the short & long term!!