According to Mark Bau’s site the QR's were relegated to departmental service after a long life as general service open wagons. In departmental service, they often carried sleepers and dirt. The doors were dropped and the sleepers would be manually thrown out of the wagon. They saw occasional service in revenue traffic when wagon supply was scarce.
Tamiya matte acrylic Red Brown (XF 64) was applied as the undercoat, followed by Humbrol matte enamel Red Brown (#100). The Humbrol paint was lightly applied to enable the darker and browner Tamiya undercoat to ‘ghost through’. This resulted in a deeper and much more interesting finish. Next, a coat of Pascoe Long Life floor polish was applied, which provided an even, glossy surface for decals to adhere to. Weathering was achieved by using a heavily thinned 50:50 mix of Citadel’s ‘Chaos Black’ and ‘Scorched Earth’ acrylics paints. The extremely fine pigment in the Citadel paints has really brought out much of the fine detail.
Update: I have updated the photos, after receiving a new camera.