All sorts of people are using toaster ovens and skillets to reflow (melt) solder paste on PCBs, but one bottle neck is applying paste to the pads. Using a syringe takes a long time, and getting custom made stencils is fairly expensive. tymm posted a cool instructable showing how to roll your own solder paste stencils. He uses the same process for etching your own circuit boards but does it on a thin piece of copper bought from a hardware store.
