grainer

noun5

1. •
   One who grains (paints in imitation of the grain of wood, marble, etc).
2. •
   A brush or tool used for such painting.
3. •
   A knife for taking the hair off skins.
4. •
   (US) A grain car.
5. •
   An infusion of pigeon's dung used by tanners to neutralize the effects of lime and give flexibility to skins; -- called also grains and bate.