I see that we can edit skin textures before starting a playthrough. But I don't see any way to do it after you've started a playthrough and want to change skin textures on a specific loaded save. Is this something that isn't possible?

We know the game front and back. The player-texture UI is gone after you start the game. 

But, what are you trying to salvage with the game save? With console commands, you can quickly spawn everything back: 

Set all 77

Set juice 99999999

spawn (weapon1, weapon2, etc)

Use the 'spawnlist' command to see how to name the things you want to restore.

Heh there is also a secret command currently, try typing 'load' into the console. It only works until reload though.

I want to make it possible to edit your character after game start, it is on the todo list but I am prioritizing other features.