I received some ATCs in a white envelope today so decided to paint the inside of it. i am pretty sure the envy is Tyvek, although the Tyvek I ordered from a kite company looks a bit different. Anyway, i sprayed 3 different colors of Moon Shadow Mists again and again; using the hair dryer just a bit, and then waiting for the puddles to dry (I did let some run off the paper). I then added some Tahoe Turquoise Color Mist spray and this really made the colors pop. I wish you could see the lovely shimmer this has on it from the Moon Shadow Mists. It has an old map sort of look to it.