In the less than sunny island we live on PL Collinite 845 will last 3 months in the winter due to the less than favourable road conditions - salt etc
As PL said Essex fk1000p first then you could go Collinite followed by the Natty's for depth. You can top up the Natty's every month or as I do use Sonax brilliant shine detailer to top the shine - you won't believe the way water sheets off the paint with the Sonax
https://www.youtube.com/watch?v=ZwKB-1tu3Rk&feature=youtube_gdata_player
Good work on purchasing the products - you really won't any other product for a long time as both the fk1000p and Collinite 845 should be used very sparingly meaning they'll last for years if kept right. Don't forget the fk1000p can go on your exhaust tips and wheels.