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

I can see an improvement on DVDs, but it makes upper frequencies on CD's harsher/brighter and more digital.

If it is true, how does it work?

If you believe something works then your mind will often trick you into thinking it did something positive.

If you can't measure a difference and demonstrate it repeatedly with measurements from independent labs - then forget it. 99.9% of the time it is just your mind playing tricks.

I tried the Greenlite pen on a few cd's that I thought sounded brittle. Mapleshade's Afterglow was one of them.
It sounded better to me with the edges painted green. I problable will get another copy of it to make a better compairison.
I do not as rule apply it to my cd's.
I like to tweak and it did not cost that much.
Give it a try, I'm not sure if they still make it.
Joe Nies

How could it?

The straight green marker and other green products approach does not work. You need to start with a layer of yellow, then a layer of blue, finished off with a final and yet lighter layer of yellow. While the end color is green, it is the layering of the blue and the yellow that is addressing the stray laser and preventing it from being reflected back onto the read surface of the disc. Additionally, if you find that the slit between the drawer mechanism and the face plate of your CDP seems a bit large, I have found that placing 16 layers of electrical tape in alternating colors of yellow blue yellow also greatly improves the sound of a new CD when you put it in your player. But perhaps it is the hour long process of removing the tape, removing the old CD, spending lots of time waiting for the marker layers to dry before applying the next and then putting all that tape on that makes me so eager to listen that I just think it sounds better.