Can I use touch-up paint on scratches

Yes, with caution. In the event of small scratches, touch-up paint applied with a fine brush may be used. Do not use paint from a spray can. Notice that any area where touch-up paint has been applied will fade at a different rate than the original paint that is baked onto the panel. As the touch-up paint fades, you’ll be left with a much more noticeable area than if you had just left the scratch unpainted.