In answer to my own question I've found meshcomp v3.0, a program for working 
with mesh files.

I now have a workflow for converting POV-Ray CSG objects to OBJ files, using 
the following method:

Convert CSG to an Isosurface using William Pokorny's ObjectAsIso macro
Convert Isosurface to mesh using Jaap Franks macro
Convert mesh file to mesh2 format using meshcomp v3.0 
(WinMeshcomp30_beta3.zip)
Convert mesh2 to OBJ using mesh22obj.py (a Python script written by ingo)

This approach makes it possible to convert native POV-Ray objects to other 
3D file formats!

Details on the various utilities below

William Pokorny's macro: 
http://news.povray.org/povray.binaries.scene-files/thread/%3Cweb.4aae23151285f23f15ee2c550%40news.povray.org%3E/
Jaap Franks macro: http://www.econym.demon.co.uk/isotut/approx.htm
WinMeshcomp30_beta3.zip - http://warp.povusers.org/stuff.html
mesh22obj.py: 
http://news.povray.org/povray.binaries.utilities/message/%3CXns94F5A773245Aseed7%40news.povray.org%3E/#%3CXns94F5A773245Aseed7%40news.povray.org%3E




"Reuben Pearse" <reu### [at] pearsecouk> wrote in message 
news:581dabc0@news.povray.org...
> I've have a mesh file that I want to convert into mesh2 syntax.
>
> I found these 2 posts that look helpful, but they turn up a bunch of dead 
> links:
>
http://news.povray.org/povray.general/thread/%3C3cc56be6$1@news.povray.org%3E/?ttop=247348&toff=3650
>
>
http://news.povray.org/povray.general/thread/%3CMPG.111efd91cef90d85989680@news.povray.org%3E/
>
> Any help would be greatly appreciated.
>
> Reuben
>

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