Clocks are more than just timekeepers; they are treasured heirlooms that carry history and craftsmanship. Over time, many clock owners face a hidden threat: the buildup of abrasive "black paste" inside the movement. This paste forms when old oil mixes with dust and debris, acting like sandpaper on delicate brass gears. Without proper care, this can lead to costly repairs or even the need for a full movement replacement.