You can cut drilled and slotted rotors. Just can't take a deep of a cut as on a blank rotor. To determine if cutting or replacing. Have to find out how much runout there is, and what the min thickness is. You do not want to cut under the min thickness. Most cases, taking off about .030" per side is the limit I would go if still above the min limit.
I have seen new rotors never put on a vehicle have runout beyond what is allowed.
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