Favorite CD treatments?

Cream Electret, Xtreme AV Liquid Resolution, Red X Coordinate Pen, Cryo or home freezer, purple pen around outer edge/black pen around center hole.

Geoffkait, no Audio Desk edge treatment or NESPA?

Tgb, no Nespa, no Audio Desk. I had a pseudo Nespa for a while - an adjustable and powerful strobe light. (I like photon canons a lot.) I used to have the Intelligent Box, another photon canon. I use the Quantum Clip on CDs and Red Sharpie for the outer edge of all Mercury Living Presence CDs, the ones with a black/white label. Oh, and the Walker's Talisman demag thinggie and Mapleshade's Ionoclast. I also happen to be a big fan of Monster Cable CD Rings.

Rip it and store it.

Someone who owned a hi fi store said the only cd tweak that made a very audible difference was a device that beveled the edges.
Anyone familiar with that?