So, I had finished the multipywr campaign a while ago, and even though I didn't have all of the nodes completed I still had unlocked the skins.
Well, you know how PSN went down recently? Well, I launched the game to find that ALL of my multiplayer skins were gone, along with my progress, and I haven't even TOUCHED the multiplayer in well over a month. So I rebooted the game, and it was STILL gone. And because PSN is down, I can't even start multiplayer events to get my skins back.