QUOTE(Lineage @ Mar 31 2013, 11:12 PM)
So it doesn't mean new car don't need coating right? I guess its better I go do coating and wax regularly..since getting White colour..
How long you recommend to wax once?

It really depends on the wax you use - I'm on Optimum Car Wax which is a spray wax. It applies very easily, does not streak and does not require buffing. Of course, all applied by hand too. The only downside is the durability, about two weeks at most with constant bombardment of Malaysia's erratic weather. One thing I love about OCW is the UV protection it provides, a sure-need.
You can go for paste waxes, or the brands you can't find in Malaysia (such as Collinite 845) as they generally last longer but they require serious effort in applying, up to the point where you might need a DA, or you will have a very tired arm at the end of the day.
I generally prefer spray waxes, not only they are easier to apply (especially for hard to reach surfaces, like your door jambs, spoilers, door handles) but good for retopping up applications (eg. bird takes a crap, remove with cleaner, clean area, re-wax). I have a few cars inside and outside of the house so I have a good estimate on how long it lasts. A weekly wash and a bi-weekly wax will do good (or if you see the beading gone, whichever comes first.)