This photo prop-tiny stool was made out of nice pine I used for another project, the entire piece is only 9 inches tall, so no need for much material. But the interesting part is the finish, I have painted all in walnut stain first, let it dry and then applied grey paint over it. When dried, I have used the mouse sander to expose the stain from underneath the grey paint-it does look cool I think.
There are really more ways to achieve this effect than sanding- you can use a wet rug and wipe off the exact amount of paint (before it dries) to expose the colour from underneath-works great as well-and no dust.
Protective clear coat applied on top.