Definition
A very fine reddish polishing compound, made from finely powdered iron oxide (ferric oxide) suspended in a soft binder, used for the final polishing of soft metals such as gold, silver, brass, and aluminum. In aviation maintenance it is used to bring metal parts to a high, mirror-like finish without scratching the surface.
Plain English
A soft, red polishing paste used to give metal a smooth, shiny finish. It removes only the tiniest amount of material, so it polishes rather than grinds.
Context Anchor
Seen in aircraft maintenance or repair discussions involving polishing small parts, metal surfaces, glass, or other finished surfaces.
Derivation
The word 'rouge' is French for 'red,' which is the color of the iron oxide powder. 'Jeweler's' comes from its traditional use by jewelers to polish gold and silver. The name simply tells you what it is: the red polish jewelers use.
Why Pilots Care
Correct polishing removes surface imperfections that increase drag or promote corrosion on critical aircraft components.
Intuition Check
Rouge here does not mean face makeup. In this maintenance context, it means a fine red polishing compound.
Example Sentence 1
The mechanic used jeweler's rouge to bring the polished aluminum spinner to a mirror finish.
Example Sentence 2
After cleaning the leading edge, the technician buffed it lightly with jeweler's rouge.