What is meant by….Trick ring face

I asked Charlie Westcott about this stuff..below is what he just told me.

.”Ring lands and rings need to be perfectly flat, smooth, and shiny. No way are you gonna coat anything and keep it proper. Guys run those spacers, I have never done that cause I dont build those engines. What people need to realize is the ring land/ring interface is twice as important as the hone finish”