This procedural material of a worn out paint has a very simple node set up. It contains two materials going through a mix shader. A noise texture which is connected to a color-ramp is the masking tool on the mix shader.
@@no1inparticular426 so I built this in 3.6 and brought it into 4.1. Looks like it plugs into the IOR socket of the Specular on the new Principled shader.
