Not being an *** here, but that is not correct. You are not "removing" clear coat. The intention of the high speed is to heat the clear coat in an attempt to get it to "move" ever so slightly. The only removing of clear coat that happens is in the hands of someone who knows nothing about using high speed machines and correct product.

The answer to the question of why it looks like that is two fold

1) The hood is perched on top of the engine. Engines generate a LOT of HEAT. The reason you have a a foam or fabric liner attached to the underneath of the hood is heat dissapation and absorbtion. The hotter the paint gets, the faster it will degenerate.

2) When it's hot outside, and you go zooming down the highway, even good quality waxes will liquify and "roll off" the hood, roof, and trunk. This is why you see so many cars with crappy paint in those areas, but look ok on the sides. Persay, when you park at the mall for 3 hours in 95 degree heat, then jump on the highway and head home, you are unknowingly stripping the paint of the protection waxes or sealers provide.

The fix, which requires far more maintenance car from then forward, is to use a light compound and remove the oxidation, then go back with a quality wax for protection. Then you have to stay on top of keeping it protected, as you can only high speed an area so many times before you do begin to remove things you don't want to remove. And, black is the absolute worst of the colors for this. Black absorbs the most heat, and gets the most damage. If it's to far gone, which some are, paint is the only option.