With that orange ish color it almost looks like rust. I'd say it isn't pindot. Pindot it a lot tinier, in the pores. These spots have varying sizes, and they are much bigger. If she has tail rust, and the rust has reached her legs, I'd say rust staining? Maybe. Or it could be a stain from something external. It does look like a stain.
A safe bet would be to try to remove it like pindot first! even though it doesn't really look like its pindot. After that, if it doesn't work, and it probably won't, you could try sunfading it. I think that would work well.