An internet group that I belong to is working on two challenges - a visual journal/sketch book, and an altered book of techniques. Here is the first technique - using texture and one kind of coloring medium. I used paintable wall paper and acrylic paints, Stewart Gill and Lumiere. Here are some scans of what I did.
I used matte medium to adhere the wall paper to the book.
Then I applied Stewart Gill acrylics in two different colors.
Finally I used Lumiere to define the texture of the wall paper.
Here is my finished two page spread.