Should I be worried about not having any fire retardant on top of my rigid foam layout?  I am thinking about gluing 1 inch pink rigid insulation on top of my 4x8 plywood table to allow me to carve a stream bed and other topographical features, but I have heard that this foam could be a fire hazard.

Please advise,
Hornblower

Does anyone have thoughts about using 15" in diameter curves?  Are 18" better?

Thanks

Has anyone painted a Hawthorne train and been satisfied with he results?

Are there any significant differences between the above engines?