I sawed off the ends of the paint sticks just below the indention and lightly sanded the cut ends. I also lightly sanded all the cut sides of the wood blocks.
I painted one set of the blocks & paint sticks yellow and the other white. The first coat of paint is what will show through the cracks of the top coat of paint.
Once the base coat of paint dried, I brushed on a cackle medium, let it dry for a minute, then brushed on the top coat of paint. Be sure to follow the directions on the crackle medium and don’t over brush it.