To maintain a vehicle’s paint finish, you must repair the damage right away.
Touch-up is a cosmetic repair.
The end result of a good touch-up is for the chips to not be noticeably visible from the normal viewing range of the car. Small ones will seem to have disappeared altogether. The appearance of scratches will vary, from completely unnoticeable to much less unsightly.
See for yourself:
Check out the Before & After Photos.