> I didn't know there was a great deal of variation in OD paint.

There are endless debates about the precise color of OD around
the time of the Civil War.  While the Ordnance manuals give the
formula, using today's ingredients (the chief culprit appears to
be what's available for yellow ochre) different people get different
shades.

> At that point I realized OD stood for "Over Dirt".  Never had much
> cause to change my mind since.

LOL  The Viet-Namese for OD translates directly as "horse dung green."

Mike in Sacto