Hmm, maybe a bit of a far fetched idea, but what if I stick to having the barricades 'clean', so no spikes, fences, pipes, bits etc. But then have like 'goodie bags' filled with spikes, plates, etc. to make them more post-apocalyptic if wanted. I'd imagine such a goodie bag could also be used for other stuff like buildings, vehicles, armour on models, etc.