I received Paper Butterfly almost a year ago. It has been in a container and bloomed twice this Spring/early Summer. First bloom was on April 17, 2015. I used it's pollen on a lot of other blooms because I liked it so much! It was also pod fertile. It will be interesting to see what those future seedlings produce.
I recorded the stats on the very first scape. 13 buds on 3 branches. It did show some rust, but not an excessive amount. Maybe a 2.0 - 2.5 rating? I am probably pulling that range out of the air because I am not exactly sure how to rate rust resistance.
