This idea is thanks to a dap and graphite bendable t shirt instructable i cant remember the authors name.
So today we use Dap and graphite and a laminator. An optional tool is a print to be a guide for the circuit drawing. And a syringe to inject or pen on conduction dap silicone.
When your circuit lines are drawn laminate. when laminating the silicone spreads and flattens if your lines are too close then a short will occur. if you dont have a laminator you can put two piece of cardboard in microwave heat guesstimate 15 seconds? 35max? 1minute. immediately press laminate sheets together once heated.