This A great idea,Although I'm intrigued to see how you get on with this. You've inspired my own project (as I'd no thoughts at all on how to paint the carriage for my land train) now I've a head full of ideas for painting,and now also a use for it ,and scenario ideas for Pulp,and more.
So consider this idea 'borrowed '(just for on carriage) and the images are just geek eye candy .So I'll be watching out for the finished train or WIP.
Mark.