you can put olive oil on them...just cooking oil . That's what I do just put it on with a brush .
How Do I Get Rid Of Scale On Chickens Feet?
I've found that using a heavy dose vaseline every three days for two weeks kills the mites quite well. Just spread it on the legs until all scales are covered.
You can't get rid of them, it's a part of their feet. They have them to protect their feet because they have no feeling on their feet.