I'm using Maya so there doesn't appear to be a "self illumination" option by that name. Google searching for the solution only seems to show how to create neon lights/tron-looking objects, which I don't think is what I'm looking for.
So with some experimenting I've set its ambient color to white, which seems to have a similar effect (Get rid of any shadows not painted/AO'd on).
I can't just screenshot the viewport because for some reason the viewport renderer makes the fins or body fully transparent unless I render them.
From that point I followed the AO tutorial that was posted in the thread, setting the AO map in photoshop the way Jacque said to do it and this was my result: