I actually am looking for this topic myself! After some spring cleaning I am finding TONS of old CD-Roms that aren't compatible with my computer, or outdated, or AOL 3.0. I do a lot of work with animal shelters, and actually decided on making a sign for one of them using the CD Roms. I painted their name on three different CD's with acrylic paint. It was very easy to do and it turned out great! It dries fast and if you make a mistake, it is easy to wipe off with a paper towel. I am very pleased with how it looks. I will post a picture as soon as I get my camera back from my photo-happy sister.