Dan, Glad that you were able to get some more info on the train. If you have intentions on stripping the paint, I can suggest using "Castrol Super Clean". It comes in a purple jug, found mostly in auto departments, and the cheapest place to buy is is Walmart. It is a high strength de-greaser for the most part. I have stripped many Lionel shells, for restoration using Super Clean. I use it full strength for stripping, and pour it into a 'spackling trough', the kind you would use to put spackle compound into, to use with a wide spackle trowel. I bought it at HD, cheap plastic one, and it seems to be the right size to fit my locos in. I have had some bodies strip in about two hours, using an old toothbrush to scrub all the paint off. Let is soak for as long as it takes, get all the paint off, and then rinse it in warm soapy water, and then let it dry.
Other people I know have used "easy off" oven cleaner to strip paint, with the same results, but your body is aluminum, and I don't know what effect the Easy Off would have with aluminum.
If you do decide to use Super Clean, it can be used quite a few times before it loses its potency and has to be dumped. It's safe to just pour down your drain, and wash it off. I personally swear by it, when I strip a shell for repaint/restoration.
Good luck, and keep us posted with progress, and the smile on Dad's face.