How do you find grease out of uppolstry? ...
Answers: Cornstarch may help heave a lot of it out; put on a gooey layer. You might want to afterwards put a layer of white composition towels, then counterweight it down with something brawny - stack of books, etc.
If the fabric will tolerate it, a strong solution crack of dawn dish soap (the colorless type) may also help loosen the grease. Test on an inconspicous nouns for colorfastness.
Then again the paper towels and mass them down.
Sprinkle Baking powder on it. Leave it on for a few hours.