design idea - PCB recycling

Much of our computer waste is recycled in India by children sat over gas burners, melting circuit boards to try and extract the metals (picture courtesy of Greenpeace India), many get lead poisoning from the fumes. I was trying to think of a solution, improving the salvaging conditions with extractor fans and better equipment is one approach, but I focused on the PCB. I started wondering if you could print a PCB, I’ve seen paint that has enough of a metal base to conduct electricity. I then saw the work of Sam Buxton, a designer who acid etches sheet metal. If the problem of extraction is based on the current method of board manufacture, my though was to acid etch (or laser cut) the metal before bonding, then adhere it to the board using a water-soluble solution. This would allow much easier recycling, because the board wouldn’t need to be robust enough to survive an acid bath. Dipping the board in a tank of water would allow the etched metal to come away. The board could then become more easily recyclable. A board would be layered with adhesive (1), the etched metal sheet laid on top (2) holes would be drilled (3) and the individual boards cut out (4).