Design problems

I have struck a big problem, the metal conducts fine and everything works as i expected, the problem is i can not have a map / paper on top of the metal sheet, as it stops all electrical current. I have thought of as many ways as i can to fix this problem or to have another solution. The only real posiblity would be to use tin foil as the metal conductor and also the paper, for example drawing a map on tin foil. I will take it all home with me this weekend and see what i can come up with.