Absolutely all LUXSURFACE® materials are prefinished prior to be delivered. If you have scratched or damaged the surface, you may repair with simple sanding and polishing steps. These are also used to repair flame burns and to improve sheen. Light scratches may be repaired with just polishing alone. After polishing, you need to clean and finish the surface. Sanding with a Random Orbital Sander. First with 800 grit, then with 1000 grit sand paper. Polishing with a lambs wool bonnet for a large area or foam pads for a small area. To obtain a beautiful streak free finish and for the removal of dust, smears and spills, we suggest using a microfiber cloth to clean the surface. If you have any queries about the sanding and polishing. Please contact [+86 21 54466616] or [firstname.lastname@example.org].