Does this coating repel water? My daughter`s car sits outside 24/7, isn`t washed very much. I clayed, polished, eraser, and then 2 coats of the BF coating first of April this year. I washed it today and it didn`t repel the water any. If it doesn`t repel water much, how do I tell if it`s still protecting the paint or it`s gone?

Thanks