I was recently given a large roll of heavy vinyl used in the manufacturing of commercial banners and signs. One side has a nice texture for painting and the other side is smooth.
It didn't take long to discover that this material was perfect for making durable little notebook covers that could be easily painted and embellished with acrylic paints.
Pictured here are some of the results.
This one was painted with a background color and then I used circular stencils in various sizes to layer pattern on the surface. A simple pamphlet stitch binds the single signature book.
This one was painted and then a sheet of bubble wrap was pressed into the wet paint for effect.