Grainer

n. 1. 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. [ 1913 Webster ]

2. A knife for taking the hair off skins. [ 1913 Webster ]

3. One who paints in imitation of the grain of wood, marble, etc.; also, the brush or tool used in graining. [ 1913 Webster ]