...If you apply Ultima Paint Guard Plus over a car wax product, such as a Carnauba wax, you will remove the wax. We have tried this with several waxes with no negative results. However, we'd like to point out that doing this mixes wax in with the Ultima polymers. We suspect the Ultima polymers, being far more dense, settle to the bottom of the mix, but we have no way of knowing this for sure. Again, we do not recommend it...