IHG is what is called a glaze (hence the name), which means its just solvents and iol fillers, which fill in the swirls temperarily, like a make up. While it will look great at first, after a wash or two the swirls will return. If you apply it before Klasse AIO, AIO's cleaners will remove all of the fillers rendering the IHG useless, apply UHG after Klasse and IHG's solvents will degrade the Klasse layer. Simply put, they aren't compatable. Now f you are looking for the perfect shine, IMO use Blackfire, its shine is better than klasse deeper, and wetter than. Remember, clean the paint of contaminants (clay or special washes), remove marks (most here including me love 3M polishes, and the PC is awesome), them protect (Blackfire is my fav)