Last night I thumbed through an old copy of Digital Arts magazine and found a Photoshop tutorial using the masking tool, watercolour washes and textures.
Following the techniques described in the tutorial I painted some quick watercolour washes scanned them in and found a photograph to use.
I added wallpaper texture and floral brushes to add a bit of depth. I really like the end result but think it would look even better with a hand drawn sketchy portrait instead of a photograph.
Up top is the tutorial example created by Murilo Maciel followed by my own creation.