Nano-PVDF aluminum composite panel (ACP) is coated with NANO layer on the surface of PVDF layer.  

When the greasy dirt and dust adhere on the surface, besmirch would not be able to penetrate.

As a result, besmirch can be easily cleaned by rainwater.  This feature of nano-PVDF aluminum composite panel ELIMINATES the need to REGULARLY CLEAN the Panels, thereby, REDUCES maintenance cost.