Painting it with household ammonia will probably do more than just trying to fume it. I once spilled some hi-test ammonia on a piece I was fuming and had to coat the whole thing to even out the coloring. If you have scrap cutoffs from your project, try it on them. I have some white oak on hand I could try it on this morning, and if you're coming to the Baltimore CW meeting this Saturday, I can bring you some hi-test 28% stuff.
Be aware that fuming result looks pretty pitiful grayish color until you put some oil-type finish on it, at least that's what I've seen.