MILLVALE, Pa. (AP) — How do you conserve 80-year-old murals that have accumulated decades' worth of soot, salt and other deterioration? Slowly and carefully, using everything from scientific analysis to seaweed extract to everyday tools — like cosmetic sponges and shish kebab sticks. That was the approach taken by a conservation team as they labored on a section of murals at St. Nicholas Croatian Catholic Church near Pittsburgh.