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.
Dampen a piece of wash leather and use it to rub pumice on the spot to be cleaned. Brush off the pumice and rub again with a piece of dry wash leather.
 
Continue to:
More: