It rained here the past two days, a rare event in these parts, and when I peeked at my front disc brake today it was covered in rust.
So first the warning- a wet cover against the disc made it worse; if you have a breathable cover, make sure it's not laying right against the disc. My rear disc was exposed to the air, but covered by a tarp above and is looking fine. The front had the cover stretched across it and tucked under it, so it held the water there more. With the front wheel turned in the locked position, I may have to put something up there to space the cover out to keep it from touching.
Now I have this mild corrosion, and I'm wondering if there's anything I can/should do to remove it? Steel wool was my first instinct, but that could be a remarkably bad idea so I'm holding out for actual info here. Given the tiny diameter involved with the disc and the brake calipers, I'm afraid to do anything to mess with its function But one of these days, I may wish to sell the GS and keeping rust off the disc would go a long way for presentation.
Anything to be done? Suck it up and accept that they rust quickly?