Looking good!
A few in our group have discussed this idea.
But in 28mm using standard Chinese models, just painted in a terracotta colour!
I think the ‘hook’ needs to be having the figures looking a bit old and bashed up?
It may be a slightly rubbish film, but the last of the Mummy films (forgot its title) has this theme, so may be worth a watch?
I’m one of the suckers who actually bought it on Blu-ray