Here is some of my paper collection I was talking about in my "Safe Underground" artwork:Safe Underground - painting from glitter paper
The paper's off Cadbury's Roses Chocolates. You could even use tin foil or coloured cellophane.
I took photos of the paper and imported them into my painting program and moved the colour around - carving out shapes etc. It's a great starting point and the eye can see a lot of shapes and stories in the colours and negative shapes.