Use it horizontally on the curved doors and vertically on the walls - a bit fussy but it will do it especially if you work from the top with the doors.
answered on 10 Jan. 2014
Hi, just looked up a Quadrant shower. Yes it will do the job, you can use the Karhcher sideways or upsidedown. It's brilliant, wished we got one when they first came on the market. Hooey this helps.
sorry but whats a quadrant shower, I use mine on my flat panel glass shower and its fine.