Scenery for 1950s America / Fallout type skirmish game

I was wandering round the boot sale, early on Bank Holiday Monday, and I happened to find a couple of bits from the 'Cars' movie of a few years back. Basically, two Happy Meal promotional cars and a curio shop. Of course, I carry a 28mm figure in my pocket when I go to these sort of things (doesn't everyone?), so a quick comparison later I was shelling out two quid for these bits of plastic.

GW Imperial Guard for scale...

They could be the basis of something like a cross between Fallout, Gamma World and Paranoia...

I'm thinking about whether the Warhammer Historical 'Legends of the Old West' rules could be re-skinned to serve as a set of skirmish rules for post-apocalyptic America in the 1950s. Neil from Meeples and Miniatures has suggested Ganesha Games' 'Mutants and Death Ray Guns' as an alternative; I may have to download a copy of that. Of course, GW's 'Necromunda' may do the trick.

So what would I want to cover a 4x4 table? As well as the shop (which is just a re-paint and a base) I want to make a water tower - there's always a water tower, isn't there? - and a house and barn. Then I need some fencing, some trucks and cars (possibly rusted solid, but you can hide behind them) and a billboard advertising whatever film was big in 1952...

And here's the first part of that work - the shop has been based on 6mm MDF, and the step disguised with torn cork tiles. I will be covering it with sand later, then an overall spray of primer and I can start painting...

And a quick spray of black primer, an overspray of grey, and it's ready for painting. Unfortunately I flipped the top section against the newspaper while it was wet, so I need to tidy up the advertising panels, but it's looking good so far.