Fresh cod-liver oil stains are almost colorless and are easy to remove.
But old stains, especially if the material has been washed or ironed,
are a light brown and are almost impossible to remove, even with
bleaches. Treat fresh stains with either of the following:
Grease solvents.—Sponge or dip fresh cod-liver oil stains in carbon
tetrachloride, benzene, Stoddard solvent, or gasoline. When the
cod-liver oil has been removed, sponge with warm soapy water.
Glycerine.—For washable materials, pour either glycerine or one of the
soapless shampoos on the fresh stain. Rub lightly between the hands to
loosen the stain, rinse well in water, and then wash in warm soapsuds.