I found an on line tutorial on making your own Flower soft type coating.

It's styrofoam ground up. and then I mixed with white paint to make it brighter.

Here's one of them:

http://www.youtube.com/watch?v=D_tz3P9NOcY

If you google a bit there seems to be a bunch of peoples take on it.

Easy to do. I was going to experiment with a finer grind as a house coating.
Still way down on my list.

Steve