Thank you for the help, the spare tub idea sounds great. They're not all identical, but most of them are.
It just bugs me that she had it when she got here, don't know what sort of enclosure she (and the other babies) lived in before, but she's the only one with this marking. The rubbermaid has a mesh, because I'm having trouble getting the humidity down (now it's around 65%) but it's plastic and not rough at all. At least the rub hasn't gotten worse while she's been here.