Apples are coated with shellac and carnauba wax to improve their shine because consumers prefer to buy shiny apples. It gives the fruit or vegetable a sheen, which in the eyes of some customers is a sign of quality. Wax is used for a preservation purpose and then cold stored. A coating of wax helps seal in moisture and therefore extends storage life, as well as minimizing costly weight loss. You might be surprised especially the imported apples are more than one year old, though it would look fresh. Food industry spokespersons claim that the wax is safe to eat, it does give food an off-flavour. It also thwarts your efforts to scrub off pesticides that may have been sprayed on the fruit before it was waxed. These coatings are not harmful, but you should always rinse your apples with soap and water or with vinegar before you eat them.