You could do it yourself, brakes and bearings! Bit of a chore, but not that difficult. If the grinding's rust on unused discs, it'll likely just wear off as you drive it (my Golf makes disgusting noises if it's left for a while in the rain). If you've got the wheels off, you can have a look anyway. Fine sandpaper will take any surface rust off the outer side at least, and you can check for crunchy bits around the edges and dead rodents jammed in the pads. Get some discs if you want them: it's your bus, do what you bloody well like (pretend you're from Yorkshire). Worth getting new pads anyway. With the wheels off, worth feeling the surface of the discs to see if they've gone wavy. bit cruel putting new pads on wavy disks. Hassle with the rest is likely to be getting the caliper bolts off (breaker bar or rattle gun if they're really stuck on) and pushing the pistons back into the calipers (small g-clamp or piston-pusher-backer tool). Ideally, you'll need a torque wrench to the bolts back up, if you're feeling professional. Bearings easy enough to do, but you'll need a suitable drift (+ hammer) to knock the old outer races out. Don't do them up too tight. Easy for a women of your calibre . Get Dylan to help if you get stuck...
So you having a go, Sarah? I mean with us bunch of 'armchair mechanics' to help, what could possibly go wrong?
Warped discs usually manifest themselves as a pulsing through the pedal, being warped shouldn't make them noisy
I bow to your superior knowledge. Just thought the pads might catch the disc on every revolution and make some sort of noise.
Well, at least one good thing has come from this coronavirus malarkey... the world and his wife are available to answer Tech questions on TLB. Have you got them wheels off yet @scrooge95 ?