If you're polishing, no need for strip wash

If your not polishing, best and most sure method is
Acid , followed by alkaline, finished off with solvent... reasoning is every wax/sealants have different tolerance levels/ranges

Some waxes acid won't do anything, but a solvent will..others a solvent a it does anything but an acid will.....there's no way of knowing, so best to do all 3