I wanted to post the results of my first attempt at working with waste canvas. I used cheap 50 cent Ikea placemats because I was afraid of messing something up, but the final stitching doesn't look bad at all! I will definitely repeat the experiment with other materials.
Unfortunately, the patterns I made from the sprites got lost in my last computer backup (as well as the floss color list), so I can't post them.
If anyone is interested, however, I can post the original sprites that will have to be re-sized and re-worked a little bit.