I saw this load and it looked like a simple thing to recreate.

The load is made using 0.2mm Thick Styrene sheet cut into strips 26mm wide and cut to varying lengths depending on the prototype.

These are then sprayed a gun metal grey and then using a nice reddy brown paint the rusting is made. The trick is to put the paint on the brush then wipe it all off. Then lightly go over the 'steel' and this will prevent over painting them.

The wooden supports are made from scale cut basswood timber made by Midwest Products. They are cut to a width of 30mm and painted with a mid brown and wiped with a cloth and then painted with a beige then wiped again to give a nice aged look.

The straps are black electrical tape cut into thin strips with a very sharp knife and steel ruler. These are laid over the load after and glued to the under side of the car / wagon.