Dissolve half an ounce of camphor in one pound of hog's lard; take off
the scum: mix as much black lead as will give the mixture an iron
colour. Iron and steel goods, rubbed over with this mixture, and left
with it on twenty-four hours, and then dried with a linen cloth, will
keep clean for months. Valuable articles of cutlery should be wrapped
in zinc foil, or be kept in boxes lined with zinc. This is at once an
easy and most effective method.