... extremely low and the dirty is hard to adhere the panel,a small amount of dirt can be washed and removed ... % HCI, 240 hrs24 hrsAlkali Resistance5% NaOH, 240 hrs24 hrsOil Resistance20# machine oil, 240 hrs24 hrsWeatheringBoth paints have prominent feature of water ... decorationse) Telephone booths, vehicle bodies, yachts, industrial usage outside wall high quality Nano Aluminum Plastic Composite Panel