These are some great ideas. Unfortunately, the dress is dry clean only, so my hope is to prevent the stains from taking form at all, rather than washing them out after the fact.
Maya, I should have been more specific--I was using deodorant and antiperspirant interchangeably, and I know that is wrong. I found an aluminum-free antiperspirant by Adidas online: http://www.amazon.com/Adidas-C.....B0015HPTTE
Elpgal, those shields are interesting, and they have a couple of very positive reviews, but I just don't understand how they wouldn't show on a sleeveless dress. The women who posted wore strapless and liked it, so I must be missing something, but it seems to me as soon as you lift your arm you would see the shield. Maybe they are really, really, really transparent?
Suzanne, I don't know anything about blue soap, or whether we have it in the US. I can do some research. Same about rock deodorant, Annette.
I guess for now, I might buy that Adidas antiperspirant and try it out. I'll report back if it seems to work, since I'm clearly not the only one with this problem.