Marinate swordfish steaks in juice of fresh lemons in shallow dish. Cover and refrigerate 3-4 hours.
Place fish in buttered shallow pan. Put salt, pepper and 1/2 melted butter on top. Broil 15 minutes, about 4 inches from broiler. Remove pan from oven. Carefully turn oven with a spatula.
Sprinkle with salt, pepper and bread crumbs. Pour remaining melted butter on top. Sprinkle with paprika. Broil 5 minutes more.