Compositor vs render

So I am just beginning to play around with the compositor. I have created a little glowing ball scene but I was wondering how to get the reflections to glow as well. Is that possible? Is there a way that I could take just my reflections into the compositor and apply the same effects? Here is the image I am working on now:
http://img837.imageshack.us/img837/5828/glow.png