I don't know if anyone else uses this but I stumbled across it on the detailing world forum and thought I would share. After I've waxed the car which can sometimes in total take 2hours including washing, I've found that the wax can sometimes start to deminish and the water beading reduces quite quickly. The reviews of Sonax BSD were that it lasts for ages. So thought I would give it a go. Bearing in mind that the video is after about 1 month and being washed about 3 times and only took about 5 m