ACM is a type of flat panel that consists of two thin aluminum sheets bonded to a non-aluminum core and is widely used as cladding for many diverse applications such as interior and exterior office buildings, external cladding or facades of buildings, hospitals, convention centers, airports, hotels, insulation and signage. Router bits excellent for scoring:

Read our article: Routing Aluminum Composite Material (ACM) Panels Like Alucobond® and Dibond®