From: Vancouver, B.C. Canada
I decided to test out the "sharpie's are bad for CD-Rs" theory a couple of years back.... so I took a silver laquer Prodisc CD-R and scribbled two thick circles on the label side of the disc. One circle on the inner portion of the disc, and one circle on the outer portions of the disc. I scanned the disc before the marking, and then again afterwards, no difference. I'm still waiting to see when the degrading will start in those areas..... it's been at least 2 years since I did that... maybe 2 and a half now.
Canada; Leading the world in being just north of the U.S.A.