I got given a whole box full of old computer CD's a few years ago and had to work out how to use them on a card - being a stamper you can never just throw anything away can you. After experimenting a bit I found this technique worked for me.
Technique: Take Lumiere or Dala Metallic paints and a sponge and sponge paint onto the cd lightly. You don't want to do it too heavily as otherwise it will take ages to dry. If you have done it lightly then it should be dry in about 15 to 30 minutes. I normally paint up a whole lot of cd's at once so that they are ready to stamp onto. You can then stamp using black brilliance or black staz on ink pad and again it will take about 5 to 10 minutes for the ink to dry before you can attach it to your card.
Materials: Cream cardstock, CD, Lumiere or Dala Metallic paint, Black Brilliance or Staz on, Selection of butterfly stamps, Hero arts word stamp, butterfly charm, stipple brush or old fashioned shaving brush works well for stippling, amber and butterscotch dye ink pads, Skeleton leaf
Method: Fold cardstock in half to create square 15 x 15 card. Sponge paint onto CD as described above and then when dry stamp with selection of butterfly/word stamps. Stipple amber and butterscoth onto cardfront using stipple or shaving brush and use same ink pads to stamp butterflies directly onto cardfront. Attach skeleton leaf and then CD and butterfly charm.
Hope you will give stamping on CD's a go.