If those two projects don't have you inspired to combo some of the chalk / clay paint colors, here is my old dining room mirror. (fabulousfinishes.wordpress.com)
The paint plus primer made me wonder if it would adhere similar to chalk and clay paint on a variety of surfaces. (youaretalkingtoomuch.com)
The most curious is a spiky clump of clay painted terra cotta and black with speckled white dots. (latimes.com)