Boston.CTS said:
thxs I didn't know that ,very good info

k stupid ? its not like oil so in the summer do I need to strip it before using a normal wax ?
Short Answer? Yes.
Long answer.
Well, regardless of the type of wax you use, you should strip/clean before waxing again in the summer. Airborne contaminants, salt residue, bird shit, and acid rain will etch and stain the clearcoat. Which means that snow will as well, tho not as fast because the surface is colder. So, gives to reason that you'll have to clean the clear coat before polishing/waxing it again in the summer.
Synthetics last longer as they don't dissolve as easily from everyday use, whereas Carnauba will break down on it's own, even without driving.
By the way, you should also give the car a good cleaning before you wax if you're car isn't brand new. Even a couple weeks of driving will leave contaminants in your paints, especially if you drive in the city. Whatever you do, DO NOT USE DAWN LIQUID DISHSOAP, or anything similar. It will actually remove clearcoat, little bit by little bit.
Meguairs, Mothers, AND Zaino all make a good 3 step process.
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www.autopia.net