The bluecoat will cover up the fact that she's wounded from the other birds, they won't peck at the blue it's not appetizing like red is. But if she's low enough in the pecking order that the other birds already did that, you should keep her separate for a little while anyway... it'll be easier to keep the wound clean and make sure it's not getting infected if you just keep her away from the others for a while. If it's more than say three days that you have to keep her separated, go slow with the reintroduction unless of course she's isolated in view of the other chickens...
Welcome to BYC and post in the emergency section for more responses... More pics will help to, good luck.