Thinking a good soak in a tub (so it lay's relatively flat) with a lot of water and synthrapol might work. Certainly wouldn't hurt. Note that you need VERY hot water for synthrapol to work. I would go so far as to say that to get enough hot water in a bath tub - I'd be boiling a big ol' pot to add to the bath water. I'd also toss in a color catcher as an "indicator" to see if the darn thing is done bleeding.
I've never used the RIT color remover product.