Oh, it's a jumbled mess of Kotobukiya chain base parts, Bandai's "Armored Factory" walls, and a whole lot of WAVE's H-Hangar sets.
I've got a lot of work ahead of me, incorporating 1:100 scale workers, guards and transport vehicles, Destroid bays...
On the contrary, I used the waterslide decals that came with Bandai's "Armored Factory" [sic] model kit.
They're a perfect fit for the Hi-Metal R GBP.
Bandai and ARII have produced numerous other 1:100 scale kits with appropriately-sized decals:
All this rampant customization has inspired me to do some work of my own:
I felt the Hi-Metal R GBP amor was a little too plain and lacking in detail, compared to my Arcadia, Yamato, and even Takatoku versions...
...so I added additional markings and insignia, using animation model sheet line art as a guide.
I especially wanted to replace Bandai's sloppy-looking "1" on the chest with something cleaner and more professional.
What do you think?