After sanding down the filler, I made up solution of water down PVA glue (7 parts glue to 1 part water), mixed with ordinary dirt from the garden because it’s free. A heavy coating is applied to all the fillered area’s and a lighter coating over the rest. Further dirt is applied to enhance the raised areas, the wall was put into place to bed into the scenery. Foliage, twigs and root were dotted around in areas and modelling stone ballast was sprinkled over areas to give the impression of a track and down the centre of the lowest level (in case I wanted to use that as a track also).