Polished aluminum mirror sheet is produced via mechanical polishing. There's no electroplating coating at the floor. Before sandblasting and anodic processing, there's no need to retreat the anode or plating movie. It may be without delay sandblasted and anodized. The grit size can reach more than 240 with out pre-treatment Processing, direct printing, stamping method, high reflective. https://hw-alu.com/products/reflective-aluminum-sheet.html