You can and you'd need to go extreme lengths to pry off the internal dust filter stuck on the stator. If you do rip the PVC film on the dust filter you need to re-film not drum tight but securely from a PVC food bag wrap. You must do it in a dust free environment. Even using special equipments and a dust free room (room where we open up hard drives and recover sensitive data off the platters of faulty drives), it was a very tedious task to retain originality and I would not do it again.
Ohh well.. not too encouraging. Can't see any dust outside the stator, so it might be on the inside. Yet, I can't seem to figure out how to get that grill out of the way! It's pretty hard to replace anything with that grill in place..