Looks like there are some good suggestions on removing the outer layer of paint on that train car restoration forum. I can already see the layers through some of the crazing and chips, I'm hopeful that since the park paint is already lifting and chipping off, that it will give way easier than the original layer. It looks like there are just a couple of layers on some parts but others may have more. There is also a lot of different colors under there. I think I will try the citrus stripper, possibly diluting it. I've used that before with good results. I'll do it in small amounts for short time periods on the underside first, being careful not to be tempted to "John Wayne" the project. I will post some progress photos.