To begin

Painting tyvek - 1

Take one sheet of tyvek. Paint a base colour - since I didn't know what I was doing I could have painted the base of burnt sienna a little more or even as a wash. Next take a wet paint brush and flick some black on, then water it down and flick again to make grey dots. Finally brush in some swirls.

Below I have used a toothbrush to spray some green paint and some fine lines have been drawn in with bamboo skewers.