I wouldnt have realised what blue coat was if I hadnt been reading through a very old thread from January late last night. I had made mention of a spray I use- and the American equivalent was discussed in response. Its basically the same as I products I use here in Australia on any wounds on animals. Many people on here use it on their chickens for a few different reasons.
Being that it does stain the skin ( and feathers ) - it would be harder to see if there is any sign of infection developing. A course of antibiotics to go with the bluecoat is what I would recommend if taking her to a vet isnt possible. Not too sure on exactly what kind of antibiotics you guys can get from the feed stores, but I have read of a few different ones being available.