Tips for success: If at any time the candy begins to harden, reheat it in 10-second intervals in the microwave until melted. Use different widths of craft brushes for varied brush strokes. Buy several craft brushes so you won't have to wash and dry one brush between uses. They are inexpensive and can usually be purchased in bags of 6 or more. Pat the fresh citrus slices dry with paper towels before applying to the sides of the cake.