I use the ONR without the wax for this reason. I would think it's such a small amount verses actully putting a full coat of wax.
I would say do a small area to see.
I have begun to shy away from putting a coat of wax over sealants. There have been some discussions of whether some waxes could actually degrade the sealant coating.
I'm no chemist but it does bring up an interesting point.
No doubt folks with more knowledge will jump in.