LCT Paintball wrote:
I understand that foam has some heat issues that require white
paint.

My understanding is that in non-structural applications, this isn't such
a big deal. The high heat from dark painted surfaces in direct sunlight
can cause shrinkage of the foam core. In a wing or canard, this can be a
"VERY BAD THING" (TM).. but in a non-structural mockup, where the only
thing it has to resist is raindrops and paintballs, I wouldnt get too
excited over "core" shrinkage.

You could even do it over a light plywood or fiberboard core. Again,
this is for non-structural applications.

Dave