Like Zaino, Liqud Glass, Klasse, etc. Over at Auotopia the general consensus is that Dawn doesn't remove cured polymer sealents. It does remove carnuba and silicone wax coatings. If you want to take the coatings off to the raw clearcoat surface, use a 50/50 mix of Isopropl alchohol. You can buy Isopropl with this mix ratio already. This has been recommended (after washing) prep for polishing the surface and again prior to applying your polymer sealant of choice.