Using the same method as step 4, spray water on the area and use the 5000 grit sandpaper.

Sand up until the tape, making sure to sand evenly, covering the entire taped in area, and keep it lubricated with water.

Keep the sand paper flat and only sand in the direction the width of the scratch, not the length of it, as depicted.

Dry off the surface to inspect the area. It is better to have an even haze from sanding rather than being able to see individual sanding lines.