The other groups that have skinned ships (on Sisi, at least) are Wiyrkomi, Ardishapur and Nefantar, iirc. I'm fuzzy on whether it was Ardishapur or not, and I can't recall which corp from the Federation is the other one. It isn't Quafe and I don't think it's Inner Zone either. (Edit - thinking about it, I think it actually is Inner Zone.)
I'm okay with this being the initial form of delivery for these items while CCP gauges interest and how much people use it.
Ideally, I would like to see the final form be something using LP stores, with a system that works something like this:
- Player acquires LP for a given corporation through some method - be it missions, FW, ESS or conversion of CONCORD LP from incursions.
- Player opens the LP store for the corporation, which has a variety of fully-generic paint BPCs based on hull size: the NOH LP store would, rather than having BPCs for specific ships, would have generic blueprints along the lines of "Nugoeihuvi Paint Job - Frigate Blueprint", "Nugoeihuvi Paint Job - Destroyer Blueprint", etc. all the way up, perhaps, through capitals. So rather than buying a conversion blueprint for a NOH Merlin and an NOH Condor separately, the player would purchase two generic frigate BPCs and use those. Ideally, these blueprints could be used on ships from other factions as well. Perhaps a second set of blueprints might be needed for a slightly higher charge, like a "Nugoeihuvi Paint Job - Foreign Frigate Blueprint".
- Then whatever system for skin application is being used is applied.