Spray-painted solar cells promise cheap power on seemingly any surface
This sounds a little bit weird and almost like those secret agent movies 😀 http://o.aolcdn.com/hss/storage/midas/526866d9bc8799266a465ac26a36cd38/200522220/sheffield-spray-painted-solar-cells.jpg http://www.engadget.com/2014/08/03/spray-painted-solar-cells/