Therefore, I had to redo the whole roof, but now I shines without this one curly hair.
I decided to assemble the window-pane in the car body and to put the roof on, just to see how the final result will look. There is still a couple of things to do. The axles still have some rust and need to be treated again. The wheels need to be polished better, to get rid off the last bits of black sooth.
Additionally, the lamp holder is severely rusted and it will be difficult to get it in a better state, because of all the grooves. Perhaps I will replace it with a new part. Well the couplers were also gone, so it will get some new shining couplers as well. The brass tank lids have some rust grooves and although it is polished and it shines, these grooves remain visible. A testomony of age, I would reacon.
Some blokes asked for it, so here is an additional picture of the All Nation Line C&LE box trailer kit in finished condition, well all but the couplers.