A lot of posts and pics of nicely waxed cars here. I wax my 1988 535i E34 (same model as 1989 in USA - I guess BMW used Hong Kong as test market) with Johnson Wax softwax, and because HK is so polluted, dirty, rains a lot, after the first rain or first wash job in 1 - 2 weeks, the wax job is basically finito. How often do you guys wax your car(s) and how long does the wax job last? Or how do you wash the car and maintain a nice looking wax job?