Ok - so a friend of mine (thanks for the inspiration Lisa) told me about the idea of stamping an open image on the back of vellum and then coloring it in w/ the watercolor wonder crayons. What?! Color on vellum?! Well it makes so much sense! If you mount it w/ the crayon side to the white paper below then there's no danger of it smudging! Fabulous!
So, clearly I had to test it out for myself. I attached the vellum to whisper white card stock (after daubing some color on the white, of course) with the great SU brads... and voila!
Stamp sets: Time Well Spent (Hostess set, level 3) and Much Appreciated
Colors: Old Olive, Groovy Guava, Taken With Teal, Pumpkin Pie and Whisper White
Other SU products: White vellum card stock, Watercolor Wonder Crayons, Earth Elements brads, sponge daubers, Bali Breeze Designer Series Paper, 1/2" Circle punch, Cherished Memories rub-on