Here's something I never really thought of: Dust Art. The idea is to draw or paint detailed pictures in that film of dust that coats the back window of cars after a drive down a dusty road. To me it looks a lot like working with scratchboard.
Recently I was introduced to dust art through a post on Smallpax by Michaela Lawless (and we're not going to get into how I wish so hard that my last name was 'Lawless' -Ben Lawless... oh man). Anyway, she posted this sock-off-knocking picture of her own dust art:
Good show, Lawless!