answer is eyes
I walked through a field of wheat, I picked up something good to eat,
It was white and had no bone, In twenty-one days it walked alone.
What did I pick up?
I am in a land where thirty men and two women were dressed in classic black and white dress.
They began to fight as soon as any of them moves.
Where am I ?
Paint me up to look real good,
Then take me to the shop to maintain under the hood.
Use a small brush to make no mistake,
Or just replace me with something fake.
What is It?