“Not bad,” Lightning Dust said, gesturing for her wing. “You missed… down here, by the end.” She lowered her head, fixing the feathers herself. “It’s easy to miss them—some ponies don’t even care, since they’re always getting moved around by flying anyway. But it’s the professional way to preen.” She straightened, lifting a little container from the shelf. “Now, since we degreased, you’ve got to wax them. You make wax on your own, but… this stuff is better. Professionals strip their own wax on purpose before shows and stuff. But we’ll save it for when your wings get really desperate, like they were earlier.”