number of "coats" of paint

Guy that painted my car has been painting for 50 years. He shot 4 coats of clear, gave it a wet sanding & then another 4 coats. I think it looks fantastic, you can read the serial # of a dollar bill in it.....He told me that if you only shoot 2-3 coats of clear there simply is not much left after you get done wet sanding it....