Wax bloom is a natural oxidation process of wax-based materials, just like rust is an oxidation of iron. It appears as a cloudy white film over a drawing or color lay down. If you are plagued with wax bloom, simply wipe your drawing with a clean, dry cloth and spray it with a final fixative to seal out air. If you find your drawings are prone to wax bloom, you may want to use a workable fixative intermittently as you layer your artwork and then finish with a final fixative. Wax bloom is especially prevalent in warmer climates and for artists who apply greater pressure when working with colored pencils.