Moondust - The Ultimate Abrasive

Something that never occered to me:

"Lunar dust is extremely abrasive -- and unavoidable -- as astronauts quickly learned during the Apollo missions of the 1960s and '70s. Within hours, the dust covered the astronauts' spacesuits and equipment, scratching lenses and corroding seals...Under prolonged exposure, the explorers would be at risk for everything from mechanical failures in spacesuits and airlocks to lung disease, said researchers last week at a NASA workshop focused on the issue."