Paint correction is the process of restoring a vehicle's paint by removing imperfections like swirl marks, scratches, water spots, automated car wash marring, and oxidation. It starts with inspecting the paint for defects, followed by using polishing compounds and a machine polisher to smooth the surface. This results in a clearer, shinier finish that enhances the vehicle's overall appearance and prepares it for protective coatings, such as ceramic coatings or sealants.