What is "buff stick"

Buff \Buff\, a.

1. Made of buff leather.
   --Goldsmith.

2. Of the color of buff.

   Buff coat, a close, military outer garment, with short sleeves, and laced tightly over the chest, made of buffalo skin, or other thick and elastic material, worn by soldiers in the 17th century as a defensive covering.

   Buff jerkin, originally, a leather waistcoat; afterward, one of cloth of a buff color. [Obs.]
   --Nares.

   Buff stick (Mech.), a strip of wood covered with buff leather, used in polishing.