[ds, sg] tech and scratchbuild questions

G'day,

First up thanks for the blimp info guys.

Now first up the "what do you think" tech question....

Do you think the computer generated displays in the helmets of the
future
(are they called huds or something??) will be customisable colour wise?
So
maybe you could have "standard", "colour-blind" (various kinds), "grey"
etc
settings or you could have a limited number of settings so it suits you.
Or
do you think it would be stock standard, no-give so you could just grab
anyone's helmet if need be?

I was thinking more for fiction rather than rule reasons, maybe a guy
has
figured out he can detect cammo'ed guys a bit better on setting x,
rather
than usual army setting and that's why he seems to have the edge etc. 

OK scratch building question....

What kind of overhead (as in overhead projector transparent sheets) do
you
think would take paint the best? The ones that are printer compatible
maybe?

Thanks