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There is tutorial and more photos at the link above.
Elmers Link
How do I use Elmer's to create the painted crackle effect or antique look on furniture or crafts?
Just follow this recipe:
1.Paint the object or furniture with an acrylic craft paint. Let dry.
2.Cover the paint with a coat of Elmer's Glue-All glue.
3.While still wet, paint on another coat of a different color of acrylic paint. The painted item will begin to crackle as it dries.
4.When dry, cover with another coat of the Elmer's Glue-All as a sealer.