scratches can be sorted with a bit of nail polish, but the crack is another issue. it could be reinforced from behind with Fibre glass, but depending on the thickness depends on if it will go back on the car.
personally its a fibreglass repair and a paint job, you'll loose the CF finish, but it will look good as new. could at least do the proper repair and sell it on, then buy a new CF one if the CF finish is so important.