scooterguitar- believe it or not, even with our winters I've been able to avoid redoing the MPV. Haven't stripped it down yet this year and it looks fine. But then it probably doesn't get used as hard as some people's vehicles and I wash it as soon as it's dirty. We had a pretty mild winter this last time too
SamIam- Oh how I miss the Volvo, when I had that I could park the MPV for days and do things slowly! Now it can't be off the road for long as it's my only dog-car
I get one coat of KSG on it after whatever prep I do (polish, AIO). Let it sit overnight and wipe off the next morning. I then immediately apply a second coat and let it sit as long as I can before buffing off.
Sometimes I do this initial work panel-by-panel, one panel after each of a few washes. I keep notes so I know what I've done to which panels. Doing the whole thing at once is a big job (and with no Volvo I can't take forever). Just *washing* it is a big job! Polishing one panel or so is more manageable.
Then I add another coat after each of the next few washes. I do a quick test with some Sonus green clay to see if it needs claying before doing the KSG (it seldom needs it).
Once I get 4-6 layers built up this way, I don't add more KSG until I notice a change in the beading. Then it's Sonus green as needed/KSG. I don't strip it down until I get some marring (usually from the seemingly inevitable trips to the bodyshop

) and have to do some abrasive polishing.
I've been using FK425 after each wash, and it's worth it IMO. Never did it before as I was sorta testing the durability of the KSG and didn't want to introduce another variable.