Since completing Stage 4, I have gone ahead and completed the model.
The end steps, lamp brackets and roof vents were painted satin black and glued into place with the latter glued after the roof had been fitted. For the roof fitting I used the very useful IP Engineering Roof Assembly Jig. Before I fitted the roof, a couple of passengers and posters were added.
Brass hand rails were shaped and fitted to the roof and coach ends.
All door handles and grabs very enameled with Humbrol Enamel No.54 Brass.