I have used the thin metallic fabric in quilts by using a light fusible behind it before it is cut out but have to be careful of iron temperature. It does melt on high heat. When I do art quilts, I try to make the design fit on the top of the bed with the borders down the sides. This means you applique on a smaller amount of fabric. I would also paint the pieces before you applique them on. Everyone has to try what sounds right, then try again! Sounds fun!