Food-grade paraffin wax is used in some candies to make them look shiny. Although edible, it is nondigestible; it passes right through the body without being broken down. Non-food grade paraffin wax can contain oils and other impurities which may be toxic or harmful. Impure mixtures of mostly paraffin wax are used in wax baths for beauty and therapy purposes. Paraffin wax is not used much to make original models for casting, as it is relatively brittle at room temperature and usually cannot be cold-carved without excessive chip ...

See also:

Paraffin, Paraffin - Physical and chemical properties, Paraffin - Uses

Read more here: » Paraffin: Encyclopedia II - Paraffin - Uses