A few years back I would be working on a work and find some down time when I wasn't working. I would paint on things. The rocks are fun to paint on with acrylic paint. The piece of walnut wood took a while to get the paint to self seal itself on the wood. Once I had enough coats of acrylic paint the bottom layers dried into the wood and sealed the porous walnut wood.
The colors are not quite correct here but I wanted you to see closer the natural wood texture that is at the top of the walnut slab of wood.
This one is a little weathered from laying in the kitchen window ledge. It took on moisture. It makes it look like it has been antiqued.