Re: baloney slices the other way,
Do you mean convert from Sketchup? If so, you should be able to export .obj and import it into AC3D.
If you have a series of line profiles, you can use the convex hull (Vertex->Create-convex surface/object) to make surfaces over a shape (note that it works convexly, so for concave shapes, you may need to do it in parts and delete extra surfaces that are created).
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