Mix 1/4 cup of corn starch and 1/2 cup of cold water in a large bowl using a wooden spoon.
Pour 4 cups of water into a pot and heat it to boiling on the stove.
Pour the boiling water into the bowl.
Mix the boiling water with the corn starch mixture using a wooden spoon.
Allow the mixture to cool entirely.
Pour the mixture into a spray bottle. Shake the bottle before spraying the wall hanging.
Pour 1/2 cup white glue into a bowl.
Pour 1/2 cup water into the bowl and mix thoroughly with a wooden spoon.
Pour the glue mixture into a jar, and apply it to your wall hanging with a paintbrush.