I've been looking...without much success...to find different methods for building a passenger car roof (with clerestory). So far, I'm trying out a method I've thought up: The roof can be broken down into 3 assemblies: 1) the arched sides 2) the clerestory. For the car I'm building...the arch sides are each 2'4" wide and 10" tall...and the Clerestory is 4' wide. The Clerestory should be quite easy...but the sides & ends...bull nose profile...should be more challenging. I've started with the arched sides. I've built an angle beam 2'3" wide and 9" tall. I've added a piece of 0.010" thick styrene sheet over this. I plan on adding another layer of 0.010" styrene on top...which should be easy if the first layer is solid. I'll modify the beam at the ends to get the profile. Has anyone done/seen/read of anyone doing something like this before?