Can the New Refinish Solution be used on prefinished floors?

Yes. The New Refinish Solution is perfect for refinishing pre-finished floors for a couple of reasons. First, prefinished are factory finished and will vary greatly in look once dry sanded. Second, the eased or beveled edges become uneven when dry sanded. It will never look quite like it did out of the box. Very thin or engineered floor that cannot by dry sanded and are ideal for the NRS.