I have a red car which acquired an interesting deep scratch. It seems "deeper" than most scratches I have seen, and when I touch it up with paint (brush) It still leaves a noticeable difference in depth. It also appears a darker color because of this (?). I was thinking I would apply more paint, then use some scratch-X to rub it down, and repeat that a few times. I'm selling this car and I'm not willing to invest thousands to fix this little scratch Comments?