Intriguing idea! I went looking for websites and found these:
http://ingridwhitcher.com/marbling-f...ing-cream:7953
http://blip.tv/empress-of-spring/pai...ng-foam-100034
http://suebleiweiss.com/freeprojects/shave.pdf
http://www.dharmatrading.com/gifts/s...e-mx-dyes.html
http://www.dharmatrading.com/gifts/s...e-mx-dyes.html
Looks like they are all demonstrating how to marble fabrics. Suppose you could use stencils also. The shaving cream acts as a suspension medium for whatever coloring agent you use -- food coloring, tempura, acrylic paint, liquid or powdered dye.......