This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
Many times when working around machinery, the clothes will come in contact with iron and get rust stains. These may be removed by using a weak solution of oxalic acid which must be applied carefully as it is highly poisonous. Sometimes the stain can be removed by washing the spot in buttermilk, in which case rubbing is necessary.
Small bits of onion placed in A room will absorb the disagreeable odors of paint and turpentine.