You have a low rust spot where the pads sat near the disc. Drive the car for a while with the brakes lightly on to clean the surface of the disc and pad.
If that doesn't work, angle grinder with a wire brush attachment on the disc surface and lightly sand the pads surface. Check the calipers over at the same time.
You have a low rust spot where the pads sat near the disc. Drive the car for a while with the brakes lightly on to clean the surface of the disc and pad.
If that doesn't work, angle grinder with a wire brush attachment on the disc surface and lightly sand the pads surface. Check the calipers over at the same time.
If that doesn't work on car disc skim