Does coloring the edges of CD's help the sonics?

I'll tell ya what does make a difference: trueing the runout of CDs via an Audiodesk lathe. I had a dealer do this to several of my CDs while auditioning some gear a couple of years ago with my wife; we did A/B (before and after) listening and in every case there was an improvement in clarity and depth. My wife confirmed and she is a huge audio skeptic with WAF at a constant "11"

One of these days I'm gonna break down and get one.