I started by preparing a surface for representing the paved lot around the buildings. An access road will cross the tracks to lead to the warehouse buildings. I used more of my supply of left over foam board to build up the road sections between the tracks and the main area in front of the middle and right building.
Once firmly glued in place, I had a nice level surface to work with for the lot and road. For paving material, I use DAP Fast 'n Final spackling material with black paint mixed in. This leaves a nice gray appearance for the main coat.
|I put an amount of the spackling into a plastic container (left) and mix in black paint until I get the color I like.|
The material is very nice to work with. It is not messy and dripping like plaster. It is more like cake frosting but without being too sticky. In fact it is fairly easy to remove should you get some where you do not want it. I work it onto the surface area with the mixing spatula, then use a drywall knife to smooth the area, I end up with a fairly thin coat of material as the smoothing will remove material as you do it. It can be tough to get all marks out of the surface, but it is OK if you end up with 1 or 2 ridges from the knife edge, These can easily be sanded later when dry. As the material is colored, you will not get any white to show through when sanded. You can also mix up a darker batch and apply over the dried first coat to represent patched areas and pothole fills.
To ensure the external building would sit properly on the paved lot area, I built a foundation from bass wood, and then lightly pressed that into the spackling after it set up a bit. Putting the building on this ensured it would sit flat and look "planted" instead of on top of the paved area.
|The foundation put in place. A little of the material pushed up along 2 edges. I'll be able to lightly sand this down, as well as sand the 2 ridges you can see|