How well do frozen oranges peel after frozen?
Well, it wouldn't cost much to figure it out! I'll try a guess, though, and say that it will make peeling MORE difficult. The peel will be stiffer, and I think the pith might be even more likely to stick to the orange flesh, and maybe less likely to stick to the outer peel. But I'd like to know what your results are if you test it.

I'd say if you're having a lot of trouble peeling your orange, I've heard that giving it a good squeeze before starting can help, and there are also some easy-peel varieties out there now.

And of course the pith won't hurt you and unless you leave almost all of it, you're not likely to notice it after you run it through a blender with the rest of the orange!