In order to receive a code for the Citadel Grey Skin you will need to browse the wiki's Freelancer pages/other articles and then provide constructive feedback in reply to this post on 3 things from the list below which you:
2. would like to see more of
3. think could use improvement
4. feel is missing
That's it! Either give me your Discord/Reddit user name in your post or if you are a registered Fandom user then I will PM you the code that way.
Thanks so much!