... painting b) Core: nontoxic polyethylenec) The back side: aluminum alloy sheet coated with polyester resin paintingd) Surface finish ... installation, easy processing, easy maintenanceb) Excellent in heat insulation, sound insulation, fire-resistance, acid-resistance, alkali-resistance, weatherproof ... vehicle bodies, yachts, industrial usage outside wall high quality Nano Aluminum Plastic Composite Panel