If you go behind /spawn there are crates and to the right there is a Rainbow crate which costs 45 crowbars to open and can give you different tiers of skins. Once you open them you will get a book which you give to the Skin Collector and you can activate it. You can get Skins from Loot Crates, Crowbar Crates and Skin Crates.
Any staff know the % chances of finding a skin in a loot chest, and if possible, could anyone post a screenshot of them finding a skin in a loot chest? Not sure what it looks like.
Hotwheeldan found a green homing skin yesterday, there really rare because i opened crates for an hour streight and i did not find one. They look like books.
Pretty low, best way is using the skin crates. Glad you guys like the update though, devs spent a lot of time on it!