The upholstery should have zippers or velcro. See if they do. If not, I'd put a soaking-wet towel in the bottom of the tub and lay the cushions down on it (stain-down, kwim?)
You could also try club soda.
ETA: Wasn't there a thread recently from a BBB'er who had a stain on her office chair and got good advice on how to get it out? I searched but can't find it.
Last edited by ThreeofUs; 12-04-2010 at 05:12 PM.
-Ivy
Parenting two active, wonderful boys
This is your world. Shape it or someone else will. -Gary Lew