I wish they'd sell that WOWA product in the US. I have to believe the reasoning is because of marketing and the long-suspected relationship between Zaino and DG (oops, sorry for turning your thread into a firestorm)
Just top the 845 with Aquawax as a booster after washing. If you want to start over with Duragloss, I had good results with Duragloss 101 sealed with 845, then Aquawax as a booster.