I had a bunch of fimo sitting at home and decided to something with it. I dunno how but I eventually thought that using stamps to make the pendant design. Worked out pretty well! Few tips that I learnt from my first (and only so far) creations. Try and keep the fimo shape as flat as possible otherwise it will turn up a little at the corners. Be as gentle as possible when pushing in the stamp as it will leave a dent in the middle. It might also be an idea to (once you've finshed painting it) cover it in clear nailpolish to stop the paint scratching off.
Place the fimo on baking paper (when the time comes it will be easy to remove). Cut the shape and size you want.
Sorry none of my instuctions have helpful pictures! If I had found this site 2 years ago they would have :(
Press the rubber stamp into the fimo until you get a decent indent. Skewer holes into the top corners. Then follow the instuctions on the packet and place in the oven as directed.
Wait to cool. Now to paint it, it's way easier to do the cracks/lines first all over-wipe it off (will leave the lines filled in) and then paint the rest of it. Attach jumper rings, a chain and wait for it dry and your done!