Polish the trackpad due to uneven patch

Hi folks!

Today I received back my MacBook Pro 15" from maintenance service due to water damage. The technicians replaced the upper case including the keyboard, battery and trackpad. The trackpad may be a refurbished item because there is a little uneven path on it .

I won't bring it to maintenance again because I have to wait minimum two weeks again until themy 'may' decide to replace or not... and I expect they won't.

Is there any possibility to polish the trackpad? It is no deep scratch and you can't even see it. You can just feel it. It feels like it is some dirt on it of dirty cocolate-fingers.

It would be very nice if you were able to help me.

Thank you, have a nice Sunday and kind regard from Germany

Flo