Ji bhai jan, the two leading brands in Detailing Stuff are Meguiars and Mothers.
Mothers waxes do not remain for more than 3 days in our environment.However, they produce satisfactory results and are better than ordinary polishes like Cosmic, Formula1 etc.Mother's Waxes are available in Hyperstar, Makro and Metro.You can also find it from a Car Decoration Shop.
Now coming to the Meguiars, it is the top selling brand which has been serving since 1901.They have a great variety of waxes and paint correction treatments available.They are suitable for our dusty environment.It is not easy to find here, however if you search here and there you can find a few stock of Meguiars.
I found a few stock of Meguiars at a shop on Montogomery Road.
For the application, I would suggest you to use a buffing machine as it evenly coats the wax which result in a better shine.You can yourself compare the shine.
You might have seen spiderwebs or swirl marks on cars.These get visible on cars which are washed on daily basis and also due to improper technique of washing,driving and wiping of the dust from cars.
Meguiars provide a variety of stuff for the correction of paint.
I hope I am able to help you out