if the scratches have just penetrated the clear coat of the paint, then it will buff out. however, what you are seeing are the areas where the scratch went thru the clear coat and actually went into the paint. the only way to repair that is the sand the finish down to the bare metal, prime it, paint it, and clear coat the entire hood.
if you can live with the damage, i would, cause its not gonna be cheap to repaint the entire hood at a reputable repair shop.
clearcoat bras are a waste of money in my opinion.