Experiment with the Smuge Tool, Transparency, Opacity, and Brushes

Fonts: 28 Days Later, Stencil Std.
Stock Image: http://www.fpsbanana.com/skins/screens/54299?img=http://dog.fpsbanana.com/ss/srends/39290.jpg



Font: Marcelle.
Stock Image: http://agentscarlet.deviantart.com/art/Team-Fortress-2-Engineer-113364806
Brush: http://ka05.deviantart.com/art/Splatter-Brushes-31656209

Click for full-size.
Cheers,
Dyonysus