Okay, so I've finally got some pics of what I have done so far and I have to say that I think I'm finally figuring out how to use these spray cans.
One other thing I've found is that time of day makes a huge difference in how the pictures turn out. I tried to take some other ones at around noon and they were very dark. These were taken just before dusk and I think they capture what it looks like in real life much better than my noontime pics.