Having earlier completed my trial artillery fire pit (here) I finished painting up the rest of the hydrocal terrain I cast up using Thomas' molds. The hydrocal (tougher plaster essentially) was allowed to dry fully for about a week, and then painted with future floor polish to aid with robustness/anti chipping. I think this will also help avoid the hydocal/plaster from drinking up paint.
The scale is about 20mm (1/72). I will happily use if for 15mm figs, and I suspect it wouldn't look too far out for 28mm as well (although maybe the artillery pits would fit a heavy weapon rather than a true towed weapon).
More pics after the jump....
The paint was then applied (Craft browns for the ground, some vallejo for the metal and sandbags). I even took the opportunity for using some of my rust effects paint.
I was uncertain on the coloration of the oil cans, so chose a few likely candidates.
Some artillery positions had large steel plates on the ground to support the towed gun (especially when there was a central jack, rather than distributed ground/shock points). I chose to use some cut up shopping/credit card material. Nato green was chosen as the colour. Scuffing was used to suggest the underlying steel material.