does anyone sharpie thier CD's???

Completely concur with Shadorne's response(s).

To Shardorne's point...
1) is it possible marking the perimeter reduces error and allows more bits to be read resulting in louder volume? (I'm not an EE and have only the vaguest of notions about how CDs work...I'm asking because I want to know...not to be contentious).
2) It'd be great if someone with a sound meter could provide some comparison readings with and without marking.

Also, to Sugarbrie...I'd suggest listening to both copies unmarked first. See if volumes are the same initially.

I don't think it's merely a matter of volume. Anyway, some things cannot be measured. If you have two properly tuned pianos, one a Steinway and the other a cheap upright, and play a middle C, they will register the same on an oscilloscope. Do they sound the same?

shadorne thanks for the lesson, i am quite aware of the power of suggestion, and "PLACEBO" effect,,,, and believe me i tried this on many discs, and always wanted to discover that it was in my mind....... but it is not...... every person i have showed this too, audiophile or not, jumps back in disbeliefe when the colored disc plays..... i think you should try it...... instead of just arm chairing it.... just sayin. :)

since there is no explanation for this, only theories... this has changed how i view the digital domain.... first there is a gain of data from the coloring???? if we assume this, then there is generational loss in the CD formatt... (previously unheard of) also why not precolor a CDR prior to recording, (better transfer) also DVD's may improve, etc..... i had the chance with a CD and new pressing of a record, to do a comparison... CD first, vinyl next, colored CD, and vinyl.... i am thinking that there has always been all of the music on the CD..... in other words, the colored CD sounded as solid as the vinyl.. i have all Musical Fidelity KW system. B&W 802 spkrs...... ????