Homebrew PCBs

>     What I wish to use is a clear acrylic, welded together with the
> acrylic cement, and cause the liquid to move by using a small
> propeller.  Obviously I can't run an electronic motor inside the tank,
> and most gears and bands would probably fall apart after the first
> board is done.
Just got to thinking - In lab work years ago, a standard stirring 
mechanism was a motor (variable speed) driven magnet base for a liquid 
container (read: etchant tank) with a Teflon encapsulated magnet just 
dropped into the tank.  The base magnet would spin the teflon 
encapsulated magnet inside, stirring the liquid.  Higher speeds could 
generate a full whirlpool in a 8-10" deep flask.  I'd bet that the 
magnet s are still a common lab item - and should be cheap.  The only 
etchant contact would be teflon.  Might be an etchant agitator for PCB work.

Norm