The spray-on solution can be applied to existing garments, according to the team from the University of Georgia.

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Four out of five American households have at least one blue-and-yellow spray can for loosening the stubborn elbow joint under the kitchen sink or silencing the squeaky screen door.

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Four out of five American households have at least one blue-and-yellow spray can for lubricating the stubborn elbow joint under the kitchen sink or silencing the squeaky screen door.

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Kotkin comes close to portraying Florida as a 21st-century snake oil salesman, offering local policymakers as much spray-on charisma as a one-man ideas festival can provide.

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If anything, the experts said, a shotgun in that situation might have been the most lethal, since every shell can spray a half-dozen or more pellets, each capable of killing or maiming a person.

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Players can also leave spray-painted messages around.

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But no matter how much energy you put into building a sandcastle, it's unlikely to be as impressive as the structures produced by Stone Spray, a solar-powered, robotic 3D printer that can create entire buildings out of sand.

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Engineers can calculate the most efficient route for a spray-painting robot to take around a car body, work out how quickly parts must be supplied, look for bottlenecks or even tell if a human worker's task is likely to give him backache.

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Residents in Boston can cool off in parks with water spray features or in air-conditioned community centers across the city.

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Mark Twain famously described golf as a good walk, spoiled, but if you find no other enjoyment in a round, it can provide a lovely 4-mile walk (more if you spray the ball).

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What if booms on trucks can't reach the top of the three-story cabin to break through and spray foam?

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