3d Generation/Cross section question

I am working on a modeling project and would appreciate any help from
some Autocad savvy users. The project entails generating a root and tip
airfoil section for a wing. These sections will be done in the form of
a polyline. The tip section is smaller in length and width than the
root section. Once generated, the sections will be laid out along the Z
axis the length of the wing panel. I would then like to generate a 3D
model of the wing. One the 3D model is generated, I would then like to
extract cross sections of the wing that can be saved as a seperate
entity and exported for laser cutting.
So far, I have been able to do the following:
1. Generate the root and tip section polylines. These are closed
polylines.
2. Move the tip section polylines to a distance on the Z axis that
corresponds to the length of the wing.
3. Generate a surface between the root and tip section.
I have not been able to generate a 3D solid from the root and tip
polylines, nor have I been able to figure out a way to slice out cross
sections for later use.
CAD version is Autocad 2002.
Anyone have any ideas or suggestions?
v/r - Bob Kruger