The outside walls are not paper; they are made of two layers of (thin) wood with in between nickel silver material for the window frames and the (plastic) window material. The outside are etched brass plates (0.4 mm) which are glued to the wood (not 1 piece but some 12 pieces for each wall, all to be glued correctly). Of course this had to be painted. The stripes are some kind of tape and the lettering is decals. I painted the walls gloss and then put the stripes and lettering on it and then sprayed a layer of satin paint for protection.
In the kit are full size printed paper outside walls; these are only to be used as a guide how to paint/stripe and letter the walls and not for using on the car.
Today I added the end-walls: