I just put on a coat of S100 cleaner and then S100 wax but I won't be able to wax again for another year. So I want a wax that will stick around for that long. What do I use? I want this third coat to be tough. I was thinking Liquid Glass in the metal can but I am not sure. What else can I use that will be tough as nails, its going on an SUV that gets driven in some shitty situations, not really scrubed against much but driven in bad salt, grime, mud, and dusty gravel.