Bathaerel, also known as rustbanish, was a purplish powder made from rocks found in the Abyssal layers of Rauwend and Voorz'zt.
When mixed with water, potatoes and green plants and placed in a bag with rusty metal items, it would remove the rust from the iron, although it could not replace metal that had been already lost.
- ↑ 1.0 1.1 1.2 1.3 Ed Greenwood (March 2013). “Eye on the Realms: Abyssal Trade Goods: Not a Bad Thing”. In Christopher Perkins ed. Dragon #421 (Wizards of the Coast), pp. 31–32.