I checked the knowledge base and turned up this article for getting permanent marker off of cart labels, but I'm just double checking to make sure that it'd be safe to apply the techniques (or to confirm which technique works best) for cleaning permanent marker off of a a Gamecube disc label.
The discs look like this:
(yes, I'm late to the game on playing this remake... but damn it, I'm working on fixing that!)
-edit- Here's how they look after a few quick passes with a dry erase marker:
-edit-
I did a forum search for "marker" and read through the posts...everything seems to indicate that using a dry erase marker to trace it SHOULD work, but can anyone give me a confirmation before I go to town on these suckers (and erase any record of them being ex-Blockbuster rentals)?