So I decided to try to repair the rust myself. I first carefully removed the already cracked fiberglass trim and weatherstrip using a very flexible putty knife and a razor blade. This isn't very difficult, but very time consuming. You have to go slow and pry it off very gently.
Once finished you should have the glass and the tray as one unit. With the glass still attached I took a wire wheel on my grinder and just started grinding at the rust until I was left with bare metal.
I'm now on my way to the auto parts store to grab some more materials. I will update when I have more progress.