You can use stencil sheets and trace the design on them with a sharpie marker then run them through your sewing machine on the lines with a denim size needle with no thread. This makes holes that you can then rub the powder stencil marker over. The powder only goes through the holes.
You then have a dotted line to follow. Also I have found that in the gadget dept of a chain store the flexible cutting boards are larger than the stencil sheets and cost less. Usually 3 to a pak. for about $2.50. I also want to try the tulle idea. Sounds good.