How to clean and refresh scruffy feathers

At the moment a lot of birds are moulting - crows and water fowl for example. I found these feathers on the beach. They look quite good, but the swell messed them up. It may happen very often you find feathers of wonderful or rare birds which unfortunately are messed up of wind and weather. No reason to be sad, because with only little care necessary you can refresh your unkempt feather. You can find the whole tutorial under the cut. Enjoy! Before you begin to clean your feather you should...