what would you do, if you suspect there is a part of your 2 months old car was being repainted before delivery? How to get the dealer buy it back? Thanks in advance for any useful information.

 

It happens. Sometimes there is even touch up at the factory. I think that if the dealer did it, there is records and they should disclose it to the buyer.
But if is new and under warrantee, the dealer would be responsable to re do the job, no matter where it came from, to your satisfaction.

 

the car was brand new bought from the dealer

 

Suspecting is not good enough. You need to get an expert opinion from a bodyshop before you do anything else. In the US, auto manufacturers are allowed to make repairs of up to $500 without having to disclose them to the buyer.

 

I've let my friend to look at (who used to own a bodyshop) and the dealer has already taken a look at it today. They acknowledge the issue and waiting for the regional manager to see the car on Monday.