Most of the brushes that have a number followed by 'pixel' at the end look poor. (most of the above marks are made from those brushes, except the 3 bottom right)
There are other preset brushes that look a lot nicer, such as 'rough round bristle' (top right). I also downloaded so free rough edge brushes but nothing I could find was any good.
So then I threw this together using the 'rough round brush' for the layout and flash for the VW van just to see how the two looked together.