Dirt roads were created using modelling board and cutting to a width that would suite 20mm and 28mm vehicles.
I glued strips to the edges of the dirt tracks using PVA. PVA glue was then spread thinly over the board. Then using Diall filler I created a central ridge and covered the rest liberally with filler.
All were painted with a mix of Burnt umber and white acrylic paint.
Once all this was dry natural beach sand and various PECO scenic scatter was spread on the glued areas leaving gaps for the electrostatic grass.
Once this was all dry, the grass was then applied to the dirt track.