Spray paint? Seriously?

So, in Dina's art journaling class this week, one of the techniques focuses on using black spray paint.  Although she does fabulous work with it, I have to admit to being a bit skeptical. I've only just started playing with it, and I'll have some more layered, detailed art journal pages to share this weekend, but this is my first effort.  I do kindof like it, even if it is a bit simple from a design standpoint.  So, before I render my final verdict, I'm interested in whether any of you have played with spray paint?