Yep, was going to post this as well. It is technically accurate to this specific trooper.
This figure has a weird level of extra accuracy to it (eg. specific design, OT E-11 instead of RO) that I wish other figures had.
But at least they removed the sculpted bump from the prototype which was a bit too much.
@endo1 tried with just IPA and it didn’t come off. It’s under a clear coat so removing the clear above the scratch has to come off as well.
A mild abrasive would be easiest. I’d probably try a one step compound/polish if I were doing it.
Magic Eraser is basically fine sandpaper so that would be why that worked.