Funny story about that lip. When I got the car I had just assumed parts were plentiful. That lip was all bent up from the PO and I finally pulled it off the car at some point and made plans to buy a new one. (Which wouldn't have fixed anything, since the mounting bracket was all bent up.)
So I took that lip and folded it in half and tossed it in the recycle bin. Luckily recycle is only every couple weeks and I decided to keep it just in case. Which was good, as I do not believe the part was available anymore at this point. (At least outside of Japan.)
It sat on the floor for years, and then finally with some advice from here at SM I put it back on! The reason it looks so black is I treat it with the Griot's Garage BlackShine Trim Restorer. It only lasts a month or so, but does a good job!