keep a careful eye on the red suffusion, its not a well known thing... some say its from a poor diet, some say its from liver disease, and some say its harmless and is just an abnormal thing, but lutinos are often affected. no one knows for sure, just keep an eye on it, he will get redder over time until he is nearly all red.
also, if this is a breeding pair, i would not allow them to breed, breeding two lutinos will produce weak young and many of the babies will die early.
they could be molting, birds who molt have new feathers growing in that are very very itchy. try offering a bath every day to see if this makes an improvement. can you get an aloe vera plant? if so, you can cut a piece off and put it in the spray bottle you bathe them with. the aloe will soothe their dry skin. a lot of birds when molting get dried skin, they get pin feathers which are really irritating, so theres a high chance of them molting