Looks like a beautiful double wedding ring?
..."Other than have a bawling foot stomping fit --" I'd do that anyway to make sure all the bases are covered.
What I would do is take a piece of leftover fabric and rub it on the foot and see if you can get that soiled too, then try to get it out of the scrap. You should be able to see what smears it more & what works before you try it on your quilt. Shout works well for me.
Good luck.