First, cut a small piece of wax paper. Then take cooking spray and gently spray a small amount on the wax paper. Spread the oil into a thin layer using your finger. Next, place the oiled wax paper in a bowl, and using a teaspoon, sprinkle the sprinkles onto the wax paper. Gently shake the wax paper back and forth until the sprinkles form an even layer 1-sprinkle deep. Gently pick up the wax paper, allowing any excess sprinkles to fall off into your bowl. Finally, place the wax paper on the frosted cake, sprinkle side down, and rub on the back of the paper. The sprinkles will release from the oil, and stick to the frosting. Use excess icing to pipe a border or sentiment.