(【EASY 4-STEP】Step 1 - Prepare a spray bottle of water and drill. Step 2 - Clean with gray scouring pads (P1000) →blue scouring pads (P1500). Step 3 - Polish with sanding discs (P1000 →P2000 → P5000 → P10000) and buffing sponge pads（orange → yellow → blue → black → green).