I mentioned something last week in another section (Locos and Rolling Stock on your workbench etc).... I just saw the advert for Trainoramas NOFF wagons; 6 pack for $75-. That works out at $12.50 per wagon.....so I bought 3 packs.
Yes, I know they are not the right era for me (I model early 80's), but what the hell!!! I will be weathering them and don't care what others think.....hell, nobody visits me anyway!! hahaha
The photo's of the two wagons in Anzacs pics are pretty good & indicates the colour well. It would not be too hard to replicate the load using very fine coal dust glued over some triangular timber corner moulding, spray it with a couple of different shades of deep grey, a bit of black & lighter mid grays.
Up till the middish 60's when the GP's, & older G wagons were used the load was all covered, but from around 67 onwards with the introduction of the GC's the tarps were removed, meaning the concentrate dried out a lot more, & it tended to show light grey to white washes along the base edges, almost like you see with land that has been affected by salts, which was the affect of the minerals in the concentrate.
The concentrate was heavy & why it sat so low in the wagons, on arrival at Sulphide, the wagons had a water slurry mix pumped into the wagons, & the whole concentrate was mixed together & then pumped out of the wagons, once the main load was cleared out, they had workers go into the wagons & sweep all the remaining concentrated dust into piles & again it was sucked out along with every part of the wagon, such was the value of it.
The wagons had to be cleared within the one shift & placed in the up yard to return to BH. The workers who did the unloading had to change & wash themselves before leaving the works, so that every bit of the dust was washed off them, as well as the company washed their work clothes to get any residue from them also. The wash rooms had special slurry lines to take the concentrate to the main sections.
For those who could remember the piles of concentrate at Sulphide works & was visible from the main line, it was common to see the white salt like colours along the bottoms of the piles, as the open piles were kept damp.
If your not too fussed with total accuracy, then paint the NOFF's all over black/gun metal & red stripe the ends, along with weathering they can be made not that bad to how a GP looked, some work on the outside bracing may be required if needed.