Dust the item you want to give a primitive look to. If necessary, wash it thoroughly to remove any dirt or grease. Rinse and dry completely. This enables the paint to adhere better.
Paint your item with the base coat of paint. This is the paint that you want to show through the cracks in the primitive finish. Allow the paint to dry.
Use a foam brush to spread a layer of white glue onto the dry base coat. Do not allow the glue to dry.
Apply the second paint color to the wet glue surface. The paint will crackle as it dries, giving the item a primitive look. Allow the paint to dry thoroughly.
Paint a final coat of glue onto the item. This seals and protects the primitive-looking finish.