They definitely store their chat logs, but I'm not sure if they'll send them out. I've heard of models having unfair ratings removed by directing support to check the chat log, where the model clearly typed "I do not do anal/penetration/daddy play/etc", and the member continued to push for whatever it was the model wouldn't do and then rated her poorly for sticking to her guns.
Like Alison said, it won't hurt to try, as the worst thing that they can tell you is "no", but even though I've been bored enough to read back to the beginning of the forum, I've never seen anyone mention trying it, so I really can't tell you if they will or not.