How many coats of paint does an airplane have?

The aircraft is painted in three layers of specialised technical coatings: a primer bonding coat, an anti-corrosion basecoat and the livery topcoat. The production team use a high-volume, low-pressure spray system to apply each coat in ultra-fine and even layers.



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Narrator: Over the course of a 20- to 30-year life span, commercial planes are completely repainted as often as every seven to 10 years, depending on the size, accumulated flight time, and the climate of the plane's route.

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Generally, there are two different kinds of paint used to paint commercial air crafts: enamel and epoxy. Epoxy is heat and chemical resistant and provides good electrical insulation. It also holds well to surfaces without becoming brittle, crack or chip. It also does not fade or oxidize quickly.

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White paint cools planes and increases resistance to radiation. The use of white paints with high metal oxides content helps protect aircraft. The main reason why aircraft are painted white or light colours is to reflect sunlight and minimise both the heat and any potential damage from solar radiation.

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Until just a few years ago, wide-bodied aircraft had to be washed four times a year with foam and up to 13,000 liters of water. Today, thanks to newer cleaning agents, a resource-friendly dry wash every six months is enough. It takes between 8 and 24 hours to wash or dry wash an airliner.

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The spraying of airplanes as they land is a tradition known as the “water salute.” As explained by Wikipedia, it's performed for ceremonial purposes, such as the retirement of an airplane. When an airplane makes its final flight, it's honored with the water salute once it lands on the tarmac.

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