I use 845 in the winter for my DDs. Stuff is indeed "weird" the first time you use it, but works great. Even through harsh NE winters, it will last 4+ months. I usually apply 2 coats in late November, and that lasts until the warmer weather.
'15 i3 REX // Capparis // ZGW // ZTD // HK // 20"
20% Tint, Coding, LED High Beams/Signals, Painted Reflectors, MAX2 Hardwire
Past: F30 335i, E90 328xi