I have used QEW over Zaino in the winter for the SUV without any problems. ONR should also work okay. Before applying additional coat(s) of Zaino Z2 or Z5, clean with ONR, follow with a Z7 spritz (1 capful in 32oz distill water) wipedown and followed with a Z6 QD should be enough to remove the ONR residue (polymers) or a bucket wash with Z7.
Hope this helps. :wavey