I thought it might be something I'd use like a quick detailer product but no, this stuff really works even on a fairly dirty car. I think if I had really heavy dirt and mud, I'd want to spray that stuff off a bit, but otherwise just spray, wipe, then follow up with a buff when it dries. It works pretty much like a spray wax product only it doesn't leave white crap in the cracks and crevices. I don't know if it can be used on glass, but I used Invisible Glass with rain repellent to do that. Now I just need an easy to use car vac.