Homebrew PCBs

In the thread about water soluble paper, the comment about using hairspray 
as a water soluble barrier caught my interest.  My primary hobby is model 
railroading - electronics gets into the act in loco control and signal 
systems.

We commonly use hairspray as a spray adhesive in scenery construction.  The 
cheaper the better because the cheap ones have more solids and glue the hair 
in place.  I never thought about it before, but obviously the stuff has to 
be water soluble.  It might be worth a look if the hair spray solids can 
tolerate the fuser temperature.

I also got some ideas for other applications from the comment.  You never 
know what nuggets of ideas you will find on these mail lists ;-))