Which polishing agent is recommended for gold and metal restorations outside the mouth?

Rouge is a polishing agent that is specifically recommended for use on gold and metal restorations outside the mouth due to its effective polishing properties. This fine, iron oxide-based compound is particularly well-suited for providing a brilliant finish to precious metals, such as gold, by creating a smooth and shiny surface. Its fine abrasive particles help in enhancing the luster of the restoration without causing significant wear or damage to the metal surface.

In contrast, other options may not provide the same degree of effectiveness or safety for polishing gold and metal restorations. Diamond paste, for example, while very effective for other materials, might be too aggressive for delicate metal surfaces and could lead to scratches or damage. Grit sandpaper is generally too coarse and abrasive, potentially harming the finish of metallic restorations. Baking soda, being mildly abrasive and mainly used for cleaning, would not achieve the high shine required for gold and metal restorations and is typically not used for polishing purposes in this context.