Discover the scientific process art conservators use to restore centuries-old paintings and fix the damage of past restorations. -- Prior to the mid-20th century, art restorers took a heavy-handed approach, often drastically altering paintings in the name of “improving” art. Today, they focus on keeping the original work intact with minimal intervention, and must regularly contend with past modifications. So, how is damaged artwork repaired? Noah Charney explains the painstaking process of restoring priceless artifacts. Lesson by Noah Charney, directed by Michael Kalopaidis, Zedem Media.