afriend of mine that paints high end cars for a living . is using all aircraft primers fillers skims )base coat and their clear . it got this neat little effect of having roadside rocks just bounce off without going through the clear. mark does 3 4 coats of clear as he does some color sanding. and want it like a perfect mirror . but he tells me its only about 200 more to use the aircraft stuff .,remeber houw are cars are shaped below the gig line . rock city