White Board - For stuck-on color, color over surface with the blue gel crayon, then wipe with a dry paper towel. Or, wipe surface clean with a baby wipe, then dry with a paper towel.

Chalk Board - For best results, use chalk eraser then wipe with a damp paper towel.

Watercolors - For best results, dip the brush in water, then gather color by vigorously brushing the surface of the watercolor cake.