So I finally got around to getting this one done, and I wanted to thank you for all your advice by showing the finished result.
This was all done today, including the terrain (building and blockades have only gotten metal and wash so far - Everything else is as it should be.
A little tip for those of you considering the same, and want to get rid of the grass; Just shower the plates in hot water. You can practically wipe the grass off with your bare hands!
Once again thanks to everyone who contributed here in this thread. I used a little from each one of you for this little project and it looks ace!