The first photo shows the fabric after I spreaded it with the flour paste - 50/50 flour and water. I draw a pattern in the wet paste with a fork and left it to dry overnight.
Next day the paste had dried, and I schrunched the fabric to crackle it. Then I painted it with diluted black fabric paint and allowed the fabric to dry for two more days.
I soaked the fabric in water to dissolve the flour paste - a messy job!! Then I put it in the washing machine - and here is the result. I'm very happy with it. Next step will be to paint the fabric, but I haven't decided which colour!! And I think I'll do this again - the black crackle looks very good.