Possibly you need to give the brakes and wheels a bit of a clean with a fall out remover.
This works by attacking the rust oxide and dissolving it, with loosens any iron fall out from the wheels and disks.
Iron fall out comes from the brake dust, and will clean off the salt deposits too which are also causing the rusting.
Notice that you have tar deposits on the rims as well, so the wheel fall out like Iron-X, Auto Finesse Fall out Remover or Bilt Hamber Auto Wheels.
Bilt hamber is expensive but it works.. leave to dwell on the wheels for 5 mins, Then jet wash it off.
Only thing with these iron fall out removers is that they smell awful, so some wear a mask and I would say definitely wear protective gloves.
lots of videos on these products on online.