D3D

The roof was made by rollng the cardboard after it was sprayed with varnish (matt, car spray) and allowed to dry. After a couple of coats it looks and feels like plastic but is more flexible. PVA was used throughout as the adhesive. Some trimming of the roof was required on each side. Forming the roof is easy to do with practice and thin strips are provided to make rainstrps.. Internally, the longitudinal struts provide attachment points and when set the roof is rigid. The roof was not designed or described as being removable - that's up to the modeller.. This not a complete kit "airfix style" and there are no explicit rules to follow. However, the recommendations should not be discarded lightly. Try spraying some cardboard with (matt varnish) car spray and then try bending it into the desired shape when it is dry. The image below of the sides used for the video shows the shiny plasticy surface. No other adhesive was used, just car spray varnish as described. More videos in due course.

https://www.youtube.com/watch?v=1PduxTcPGzY