Did you ever get the dye off your new white handbag?
While in Hong Kong, I wore my ATL Ponte Knit sheath, and it was so hot and humid AND a little rainy, I discovered later that the black dye had rubbed off all over my white handbag! It was *everywhere.* I thought the bag was completely ruined.
But I ended up rescuing it with hairspray. Lots and lots of hairspray.... spray, let sit, rub it in, rinse off with a washcloth, repeat.
It still needs a good wipe-down with the leather cleaner, and possibly some more hairspray on a few stubborn spots, but it worked pretty good.