A 2 part video about rendering that shiny reflection playing across the screen of a phone in most cell phone commercials (it's used all over the place actually). It was one part, but golly gee willikers, I'm long winded! So I had to cut it in two.
Part 1 goes over the basics of setting up a reflection rig for doing this "sheen" pass.
Part 2 is about adding some bells and whistles, like RGB variations for the compositor's pleasure, building out other rigs for this and using the actual reflect/spec info from the original shaders. . .