Get through that covering layer and the underlying slivery colour of the aluminium itself will show through the black layer.

FORBES: My Testable Prediction About What Will Be Different About Apple's iPhone 5S

Zhong Yu of Greenpeace told the BBC's Chinese service there was a heavy layer of oil covering the coastline.

BBC: China oil spill after pipe blast 'worse than thought'

While P2i describes its invisible "hydrophobic layer" as covering the exterior and interior of a product, HzO touts what it calls "WaterBlock" technology, which is applied to the internal circuitry of a device to protect it from moisture.

CNN: Waterproof phones and tablets make a splash

Instead, it merely adds another layer of packaging, covering over the existing labels and selling the elixirs as high art.

WSJ: The Smells of Commercial Success | The Art of Scent | Museum of Arts and Design | By James Panero

She removed the lid of the oatmeal and the canned pears and peeled off the layer of plastic wrap covering the glass of water.

NEWYORKER: The Visitor