Wash the scratched area with car soap and water
Dry the area completely with a microfiber towel
Inspect the scratch to see if it is only in the clear coat
Apply a small amount of scratch remover or rubbing compound to a microfiber applicator
Rub the area in straight lines with light pressure
Wipe off the residue with a clean microfiber towel
Repeat if needed until the scratch is less visible
Apply polish to restore shine
Apply wax or sealant to protect the area
If the scratch catches a fingernail or exposes primer or paint, seek professional repair