Anywhere from 3-4 coats. The thing that I found with the plastic dip is that the more coats you put on it, the better it looks. The thicker you apply it, also helps with covering inperfections. I will see if I can find a picture where I just did the bottom area.
Thanks. Guess I never bothered to look at your windscreen when I was there last year. If I don't do something with my windscreen before I see you again, I'll have to take a closer look next time I'm in your area. (Warm temps are coming soon!)