Thanks for the clarification of my concepts bro.
Means a lot. 
Why did I write the points like that, here it goes:
1: I noticed that the dude wasn't using a proper two bucket system for washing. Dip the sponge in shampoo, rinse the car, dip it back again, all the dirt is in the shampoo. As a consequence, dirt rubs all over the paint. the sponge indeed releases dirt easily as its got almost nothing for the dirt to stick to for long.
2: Our dear bro ahmad yar told me once that synthetic wax (ref being turtle ice at that time) is kind of dry and I need to use a natural one, like tutle metallic wax (blue pack wali) for soft touch and a glossy feel.
regarding sealing off, I remember Zunny bhai posting the detailing job on his black corolla. He mentioned like "Shampooed it with ICE and topped off with carnauba"
This made the concept in my mind that for topping off, we need a carnauba/natural wax.
I noticed the dude applied only platinum on the car, believing its a synthetic formula. But ahmad yar bro clarified that its a hybrid formula so we need not applying a carnauba over it necessarily. 
These were the small mis conceptions in my mind, which thankfully, are clear now. If any other new bros has these, clarify for future references bro.
JazakAllah. 