I have Wolfgang Uber Ceramic Coating on my G-70. It's been on for about 15 months now and water beads all over, like it did on day 1. I love the stuff. Nothing sticks to it. Rubbing my finger anyway on the exterior is like sliding on smooth ice. So washing the car is easy peasy. Maybe once a month I use Wolfgang Uber SiO2 Silica Spray for routine maintenance. Well, it usually ends up being maybe once every 2 months. LOL.