Maelo

Hello everyone, i am new to working on cars and stuff and i have a question about my brakes. To whomever sees this, i drive a 3.0 A4 Avant Quattro. My brakes squeak whenever i am slowing down to come to a stop. I have tried using mechanics and they said they didnt see a problem and my brakes are still squeaking. i even used anti squeak on my brakes and that still didnt really change anything. Its my front brakes that are squeaking but im looking to just do a full redo on all 4 brakes. Also, is there a way to get rid of brake dust as well? I never really seen brake dust so im not sure if that is an easy fix or not. Thank you for reading if you did and i will appreciate all the critism and tips in the future. Be safe everyone.