I finished attaching the edging I had to remove. First I reinforced them on the inside to strengthen them. As those dried, I found kman's HOW TO: Make ABS Paste. I cut a bunch of small pieces of the ABS I had left over and added acetone slowly as suggested. I applied the paste with a toothpick and then used a rubber spatula head to push it into the seam.
Looking back after using it, I should have added a bit more acetone. It seemed to be the right consistency, but it was a little too thick and seemed to dry quickly. It worked for me, but I would have liked it looser so I could have gotten it into the seam better.
The dried paste was pretty rough and not smooth at all. I used a 220 and then a 400 grit sandpaper to smooth the finish. It's what I had on hand. If I had a finer grit, I would have done one more round with that.
Once I got the smooth finish, I used the XTC-3D to give it a glossier finish. Below are some close up pictures. You can see that it's not perfect. There are two pictures from a distance also and in those, the attachments and ABS paste look pretty good. Not perfect, but pretty good.