microwave is an awsesome method. Just a split second or so, until you hear the first crackle. then stop it and check the disk. the surface will look like crazy paving.
ps: I'm not responsible if your microwave blows up.![]()

Just Clamp 20 in a workmate, get a drill and drill lots of holes in the buggers![]()

Got another suggestion here. Put them in Will Young, Best of Rick Ashley and any folk music CD covers and no-one will ever want to go within 50 yards of them.![]()








I used to take a pair of scissors and, using just one blade, make several score across the discs. Always double checked them in the computer and none of them could ever be read.

Scribble on them with a thick tipped permanent ink 'sharpie'.