How badly do you have to scratch a CD to get it to skip? I bought a new CD the other day (factory-sealed), and prior to playing the disc for the first time, I noticed two pits on the play side. One is especially noticeable, though it isn't enormous. Anyway, it looks like there are two chips in the polycarbonate. I had never seen such marks on a CD before, so I thought for sure the disc would skip. To give the disc the "best chance" of skipping, or at least so I thought, I played it on my fiancee's inexpensive Sony boombox. I figured the boombox would not have the greatest tracking ability or error correction. Without getting into a debate on that issue, I will say that the disc played just fine. I am now playing the same disc on her Pioneer DV-C503 DVD changer -- so far, so good. So, what does it take to get a CD to skip? How resilient are CDs? On a related subject, do those "Disc Doctor" devices work? Do they really fix damaged CDs? Can they actually damage CDs?