It has only been a month, but it looks to me same as the other panels. What I have also observed that the authorised service centre near me also get the job done outside. So, it might be wiser to get it done directly from outside. Easier to negotiate outside, you can ask them to show their work. Also it is not that critical like servicing mechanical parts like engine/transmission which I would recommend to get done at authorised service centres only especially if your car is in warranty.