I have used as a pre-shave and post shave. I got a good shave when I used it as a pre shave but I don't know that I can attribute it to the cornhuskers lotion. I can tell you that it won't hinder your shave. Give it a try.
I put some CHL on my face after the hot towel, then stir up some lather. Next, I wash it off with one more hot towel, lather up, and begin my shave. I've tried with and without, and the CHL seems to help. It has been part of my routine for over a year.