21.   Most also contained vegetable oils, which spontaneously polymerize to a lacquer-like protective coating.

22.   Petroleum can kill birds by piercing their water-proof protective coating, letting in water, which causes hypothermia.

23.   The bug sucks the sap from the tree, processes it and exudes it as a waxy, resinous material that hardens into a protective coating.

24.   The diamond could be used as a protective coating for lenses, CDs, artificial hip joints and electronic components, he says.

25.   The plastic encapsulation, which serves as a protective coating for the integrated circuits, is said to be a reliable alternative to expensive ceramic packaging.

26.   The skin is tightly woven and surfaced with a protective coating of polyurethane, making it resistant to cold and rain.

27.   The strawberry farmers use water sprinklers to form a protective coating of ice on the fruit.

28.   This natural protective coating begins to disappear as the berries sit around.

29.   Upon his return, he used a photograph to re-create the outline of the unfinished book, but this time he added a protective coating of shellac.

30.   When the first sperm reaches the egg and penetrates it, the egg instantly produces a protective coating that will not allow any other sperm to enter.