I came across an article suggesting erecting a mesh type fencing on a layout's builders yard or indeed any similar project.
A square 10"x7" of Davids aluminium mesh costs £1.49 from Harlfords, and cutting strips to scale 4mm:1, will certainly cover a large selected area of the layout.
Posts can be cut to scale, using discarded plastic stem cotton buds.
A square 10"x7" of Davids aluminium mesh costs £1.49 from Harlfords, and cutting strips to scale 4mm:1, will certainly cover a large selected area of the layout.

Posts can be cut to scale, using discarded plastic stem cotton buds.