I basically agree, the main body is flat black, but those inner lines are a textured matte black, which you can see in that close pass shot from the D23 video in message #70.
Another pics I found on the net of the real Quorra prop from the PIH auction, nenox, as you can see the disc has a sanded or satinized surface, which extends to the inner C ring, where the c gap is and on the opposite side, except for the little space between the grooved lines and the inner side of the C ring where the groove engulfs them. As well you'll have to cut small triangles covering the cutouts aligning the disc shape.
Another observation I did, the poster pics showed only the special disc auctioned, where it doesn't posses the small cutouts, that means, a least two different discs have been used for the movie.
Well hello there tubachris! fancy seeing you here.
Sending this from my iPhone. But here is a quick sketch showing what I mean about the collars.
Ok, but it gets a bit boring up here. Here is a cool pic though!
but alas, I don't technically work for ISS.
Yes, we ID's the backside to have the 4 earth magnets to attach to the costume and the frontside has the 4 metal funnel-shaped collars with a LED under that. They can light up to transmit the data/life pattern above it, as seen in the end scenes of the movie showing Quorra's pattern.
You guys have really done your home work. Very nice. I wouldn't got to that expense though. Bravo. Looks great. Nice pics.