I've tried solvents, steam cleaning, sanding, and even soaking in heavy-duty detergents and boiling water followed by heating with a torch- - - - - -no luck! Once the oil penetrates the lining material, there's no getting it out. Even if the linings look clean, the first time the brake gets a little hot, the oil will come to the surface again. It causes squealing and grabbing. Reline, or replace the brake shoes.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!