This is the biggest part, if you can feel the scratches with your fingernail, the only way your going to fix it is to repaint, if not I recommend a mild rubbing compound on a wrap and elbow grease. Don't use a wheel and compound because thats a good way to get hella swirls. After you use the rubbing compound, go over the car with Meguiars Professional Polish, then finish with a Meguiars wax. If this doesn't bring them out try repeating again, but if that doesn't fix it, its time for a body shop.