If the scratches have penetrated the clear coat, you can try to repair them using a touch-up paint pen. There are many touch-up paint pen options on Amazon.
First clean the scratched surface using a cleaner like Torque Detail’s Decon Soap. In addition to removing grease and dirt, Decon Soap also helps to remove previous sealants and waxes. You can also use Isopropyl Alcohol.
Most touch-up paint pens include an abrasive tip that you can use to remove loose bits of paint, debris, or rust from within the scratches. Try to push the abrasive tip through the scratches to remove any such things. After that, wipe off the dislodged bits of paint using a microfiber towel.
The next step is apply the touch-up paint. The touch-up paint pen will probably have two applicator options: a paint tip for small, narrow scratches and a brush for larger scratches. Use the applicator that best suits the scratches and apply the touch up paint over the scratches. Try to apply it evenly. After applying the touch up paint, wait 30 minutes for the paint to dry.
After that, you’ll need to smoothen out the painted surface. Take fine sandpaper (e.g. 2000-grit sandpaper), soak it in water and wet-sand the painted surface using circular motions. Be careful not to overdo the sanding because you could easily sand through the clear coat. Once you have sufficiently smoothened the surface, use a microfiber towel to wipe it clean.
The next step will be to apply a layer of clear coat. If the touch-up paint pen does not come with its own clear coat, you’ll have to purchase the clear coat separately. Apply it just as you applied the touch-up paint, carefully and evenly. Give it time to dry, and then wet-sand the painted surface again to smoothen the surface.
To cover up any remaining low spots in the scratched area, apply rubbing compound onto the surface and use a buffer to buff it at 1,800-1,900 rpm. Don’t place the buffer in one spot for too long; keep moving it up and down to get the rubbing compound into every low spot. You can repeat this process to ensure good results.
The final step is to apply polish onto the surface. Apply the polish onto the car’s surface, and then using a different buffing pad for the buffer, buff the surface at 1,800-1,900 rpm. When you are done, wipe off any excess polish with a microfiber towel.