it's DIY kit, can apply it yourself...
1) clean the windscreen and let it dry
2) spray on windscreen, wipe off evenly (you will realise that the clothes will become darker because all the dirt and stain from windscreen is removed although you already clean it properly)
3) let it cure for at least 1 to 2 hours (recommended to apply this during night time before sleep)
4) that's it, wait for rain 

i tot u said wallet kong ady? 
stil wan tyre....

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Added on July 9, 2012, 3:42 pm
   

btw guguman, tat nano coating can rub somewhere else? 

don't worry bro, it come with a bottle liquid, polishing cloth and manual instruction as well
not salesman la, just sharing the good thing with my friends here 
here come the v12k & iXora.ix quote... 
after i read your comment, the first thing come to mind is your house mirror and window 
if your handphone screen made of glass, why not 

Same same. Cannot be avoid even we park the car nicely in the correct space.
Invest in some scratch remover or polish to remove it. The results are better than expected.

Then you got long gugu fingernails lo. 
Optimum product only sold by this LYN forumer named KC. Can also get from Muyo or Seech. Associates of KC, I think.

Banglas Nepalis washing ah? Wash and wax urself also no need to spend that much.
Plus can get exercise too.