I have discovered that if I write with a crayon on CS and then spray Smooch Spritz (from Stampin Up) it has the same effect as the Presto Paper (the special paper used with Smooch Spritz in case I called it the wrong name).
Just like writing on a boiled egg for Easter with a crayon, the color will not stick to where you write with the crayon. Stencils work well with this technique. I hope to make a project soon to post, but so far I have just been playing around with scraps of CS to test out this theory. I have used white crayons as well as colored crayons that were close to the CS color. Both varieties worked well. I found a "clear-ish" crayon from an Easter Egg coloring kit and it, too, worked.
Thought I would share. Have a great day all.