To make the radiator ducts, I was
> > actually thinking of doing this.  I figure I can wrap the core
> > in plastic, tape the mouth of a kitchen garbage bad around the
> > inlet side of the core, open a hole in the bottom of the bag,
> > then fill it with foam.  My thought is that this will leave me
> > with a nice ball of foam to be shaped.  Can anyone think of a
> > better approach? Thanks,Rusty (I sure won't use expanding foam
> > from the spray cans again)
> >
>
> --
> Jim Sower
> Crossville, TN; Chapter 5
> Long-EZ N83RT, Velocity N4095T
>
>

Thanks for that wonderful idea, Jim.  Here's one better though. Wrap the core in plastic, but put the bag in a small office trash can (one of the square ones) and lay the core in the bottom.  The can will shape the foam for you.