Eco graffiti!

This is the work of Anna Garforth.  It is a totally organic way of putting your stamp on the wall.  Here is a recipe for it.  Seems like a lot of fun.

RECIPE
*Several clumps of moss
*1 pot of natural yoghurt or 12oz buttermilk (experiment to see which works best)
*1/2 teaspoon of sugar
*blender
*Plastic pot (with a lid)
*Paint brush
*Spray-mister

And then there is reverse graffiti, making picture by cleaing.  Graphic images are 'cleaned' onto the walls with steel brushes or a sand blaster.  An old technic for a new use.