1). The new section about to be ballasted is initially vacuum cleaned to remove any debris from layout construction and track laying. Note the position of any moving parts e.g. tie bars making sure to avoid glue in these areas. 

2). Carefully scatter the ballast over the area to be ballasted. Keep the depth of ballast to below the height of the sleeper, preferably at a height that is the minimum required to fill between the sleepers. If the ballast is kept low the process is quicker.

3). Wet the area using a mist water spray. Make sure that no dry areas are present as when the glue is added the glue may take away the ballast. A drop of isopropyl alcohol in the water helps.

4). Once the ballast is wet drop over a diluted mix of PVA adhesive and water. Isopropyl alcohol added to the PVA before the water will help the mixing process. 

5). The PVA/water mix should be very liquid allowing it to be lifted by the suction of an eye dropper. When ballasting a large area we use water bottles with nozzles to apply large quantities of the mix.

6). This image shows the saturated area. Once the glue mix has been added mist the area with water and start carefully levelling the ballast using a small screwdriver or similar. Remove any grains from the sleepers. 

7). This close up image shows the track after the glue has began to dry.

8). Vacuum the excess ballast away - any surplus can be collected and reused. Check the tie bars function correctly and generally clean the area.