The paint officially used by Redbox to refurbish kiosks is "B66R11038 DTM Acrylic Gloss Color Safety Red" which can generally be found most places that stock paint. It's recommended to remove any rust via sanding and paint over it with "B66A50 DTM Bonding Primer" before using the red paint.
The carousel consists of a central solid steel rod with 8 plastic platters (decks), each deck consists of 6 quadrants (the area between posts) where each quadrant holds 15 disks, for a total of 90 disks per deck. A VMZ equipped kiosk can store a total of 720 disks (but usually only contains around 600 to keep the VMZ empty and to reserve space for returns).
The picker (or Y-axis) consists of a vertically mounted metal extrusion, with a rail mounted in the center. At the top and bottom of the section are ball bearing belt rollers, that allow the belt to rotate, but stay fixed in place horizontally. This belt is then looped through the frame of the picker.
The barcode scanner is mounted to the inside of the picker carriage's frame, facing outwards to the disk. It is connected to the internal PC via USB, and is used to determine the disk that is being returned or rented.
To access the admin interface connect to the modem, head to 192.168.0.1 and when prompted for your password use the default password on the back of the modem. You may need to do a factory reset by pushing in the recessed reset button on the ethernet-port-side of the modem to deprovision the modem and make it accessible with the default credentials.
If you're having issues getting into the unit after a factory reset, try removing the SIM during the reset process. You can put the SIM back in once it's unprovisioned.