Homebrew PCBs

The process works, and works pretty good, however, it does take a 
lot of time to do in order to get good results.  

Spread a thin film on whole board

Heat with heat gun (don't know what them they run at)

Keep gun moving so you don't burn the board

Heat an area till you see the solder flow out in a dull gray color 
onto the copper

If the solder turns shinny - you went a bit too hot in that area, 
but it should be okay.

Usually, 2 applications are required, sometimes 3.

Take your time, and as Robert stated, do it in a VERY WELL 
ventilated area - lot's of smoke!

I have been giving thougt to alternative processes though as it is 
not only boring to do, it does take a good amount of time.  A toater 
oven might make it work faster and I would suspect you would set the 
oven at the temp just above what solder melts at - as a guess.

CHris