Hmmmm. There's ways to try and train for it? I've known people with parrots that learned to go into trash cans. If she poops on you just, uh, express mild disgust and 'punish' her by avoiding her until you're cleaned off, and if she's as smart as those she'll realize you don't like it.

Maybe Ginko can give you tips, this is about the end of my knowledge.