Sorry, been outta th' Net for a few days doing the move, and it took a bit of time getting the internet back and running...
Just wanted to add that I use tempera paint to color the Celluclay... It's water-soluable, cheap ('bout a 1.77 a pint at Hobby Lobby, and it goes on sale all the time for about half that), and has enough colors to mix any shade you need to come with if you buy one each of the primary colors, a brown, plus black & white... For an 8 x 10 base, I use about a 1/8 of a cup to color the C-clay to the shade of brown you see in the jeep photo... It's just straight brown tempera, but you can lighten or darken it with black & white... If you prefer, you can use it and a broad flatbrush ('bout a 1-inch to paint the clay after it's dry as well... I just prefer to pre-color it as a time-saver... The only thing you need to remember about tempera is that it will wash off even after it's dry, and the stuff will lift and/or mix if you don't squirt it with a clear coat of some kind of barrier, like clear acrylic or even hairspray between colors...