Which are the best car polish and can it be used on any car colour without an automatic buffer?

I would suggest the following car polish products as they have good reviews and more popular in India.
Sheeba All-in-One Multipurpose Liquid Polish

There is more than 480 reviews about it.
It has a rating of 3.9 out of 5
The rating and reviews indicates it is a good one.
Approximate price is Rs. 130
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Formula 1 Carnauba Paste Wax

There is more than 1000 reviews about it.
It has a rating of 4.3 out of 5
It’s approximate price is Rs. 310
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3M Auto Specialty Dashboard Dresser

There is around 600 reviews about it.
It has a rating of 3.8 out of 5
Approximate price : Rs. 280
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