Tiger 800 Rusty Brake Rims

So just before Christmas my brother took his 2018 Tiger 800 to Fowlers in Bristol to have new EBC pads fitted to the front brakes. He's not particularly confident mechanically and with such a safety crucial item he thought he'd leave it to the "experts".

When he got it back home he noticed as he was manoeuvring the bike back into the garage that the front brakes sounded like they were rubbing, with it up on the main stand he couldn't get the front wheel to spin freely as if the brakes were binding. He took it back to Fowlers and they took it into the workshop, then gave it back and said no nothing wrong everything is fine. He took it home and parking up in the garage it was just the same.

So he took it to a local bike garage in his town who took one loom at the front brakes and said well those pads aren't fitted correctly. The mechanic took the brakes off, refitted the pads correctly and the wheel spins fine with no binding symptoms.

Now after a few weeks riding, he's noticed that the edges of both front discs are rusting see pic, the rear disc (unworked on) is fine.



Has anyone else experienced this?

Are we correct in suspecting that some sort of protective coating has been rubbed off by whatever was incorrectly fitted in the callipers?

Will carefully wiping a cure rust solution around the disc rims stop the corrosion and is it a good idea? He'd obviously ensure that nothing got on the braking surfaces.

He doesn't have a lot of money and certainly doesn't want to replace the discs.