Having spent a substantial amount of time looking for a supplier of 28mm scale sci-fi scenics, I lucked upon Fenris Games (
http://www.fenrisgames.com/). The guys at Fenris supply a big range of sculptured bases and sci-fi and fantasy scenic bits to add that little extra to your gaming table.
I purchased the pieces via their ebay store, and when they arrived only a few days later, I immediatly bought more as I was so happy with the quality. The pieces are cast in urethane resin and their vacuum degassing process leaves a near perfect, bubble free, finish. The detail is exceptional and, in my humble opinion, is probably the best I have ever seen.
When it came to painting the Sci-fi modules I decided on a grimy, industrial look. For my inspiration look at the PS3 game Killzone 2 or the film Blade Runner. The paint job was
very simple. Citadel Chaos black spray paint undercoat followed by a heavy drybrushing of Citadel Boltgun Metal. Once dry the models were washed in Citadel Badham Black and when dry, Citadel Devlan wood. Finally I dipped into the depths of my paint box to use a (glass) jar of Miniature Paints Metalic Bronze to highlight the tube, cable and wire details, which I then washed in Devlan mud.
Below are some of the goodies in their final painted form:
1) Sci-fi atmosphere processor (£5.99) The figures are Kolony Militia from Pig Iron Miniatures.
2) Sci-fi engineering module (£5.99) Again the figures are Pig Iron.
3) 1/55 scale street furniture bio hazard barrels (£3.25 for 10) The figures are zombies from Coldwar miniatures range - perhaps we have now found the cause of the epidemic!!
On Sunday I will be trying them out for the first time using a set of free rules I downloaded called FAD - Fast And Dangerous. A battle report will follow.
I built a fire step around the the entire edge using foam core. I then covered the step with pva glue and fine sand. I cut a square entrance hatch out of plasticard. To finish it off I added scaled down Helghast propoganda posters that I copied off the internet.
A Helghan officer confers with a technical NCO whilst two troopers watch on. The figures are Pig Iron Kolony Militia, the crates are from Fenris Games.
The figures shown are Pig Iron Kolong militia.
At this stage the bunker is not yet attached to the base; the detail of which I will cover in Part 3.
I am a great believer that it is the small touches that really make a scratch built model; in this case I downloaded the emblem of the Helghast, reduced it in size, printed it, cut it out and glued it to two sides of the model using PVA glue.
The final piece constructed was the roof - no guesses for the materials used...
A ladder is situated below the model and goes up through a doorway into the interior of the bunker. The finished model will have a roof (your bugs won't get in that easily Stu!) 
The bunker will also double up for my 'Kill Zone' Helghast themed Sci-fi game (using Pig Iron Productions minis (see previous posts).
The figures are from the Kolony Militia Booster pack, which contains 10 figures and a sprule of seperate heads, costing £17. The figures, as always from Pig Iron, were superbly cast and had no flash. 
I painted the figures to resemble 'space Nazis' and the Helghast from the PS3 game Killzone. If you are interested in the details of the paint scheme see my earlier Kolony Militia post. 
The fencing in the background was scratch built by myself using wooden dowl, 'granny grid', MDF and sharp sand. I have built numerous lengths and gateways for flexible use on the games table. All the other scenics are from the superb Fenris Games.
