Copper Material in Blender 2.8 Cycles + EEVEE using AO-Node

ChrisP writes:
In this video we create a realistic looking copper material in Blender 2.8 Cycles + Eeevee using the new Ambient Occlusion node.
This tutorial took me several days to create because 2.8 is sometimes a bit “moody” … BUT the resulting material looks great in the real-time (!) EEVEE viewport!
Executive Summary (~6min)
Full Tutorial (34min)

Nice.
You can get this by dirty vertex color,