Welcome to BackYard Chickens! I'm glad you joined us! Vaseline helps. You can also find an anti-scaly leg mite spray at a local farm store. If you have any more questions, I would recommend starting a new thread in the "Emergencies/Diseases/Injuries and Cures" section.
Vaseline works well, put a thick coat on they're legs and rub it up under their scales. I have also heard of success with soaking they're legs in vegetable oil.
Welcome to BYC and the coop! There's a lot of great peeps here! Feel free to ask lots of questions. But most of all, make yourself at home. I'm so glad you decided to joined the BYC family. Sorry to hear about the mites.