I have a 08 Electra glide standard with all aluminum motor and mags 12500 miles I am forced to keep the bike under a breathable cover in the drive way I also have a Honda my wife rides two feet from mine her alum. .is fine mine looks like a 30 yr old neglected bike. both are cared for the same the Harley better though. I have had the problem since Nov when it got cold and damp, I have spent days polishing it out and the problem comes back in days. have had Harley check it out they tell me the 517 millivolts to ground has nothing to do with the problem and it is not a warranty issue it is something I used to clean the bike.my problem not theirs. I had two Honda's before my first Harley last year an o5 road king all last winter no problems on that also alum mags and motor can anyone help. thanks I'm beginning to think I should have gone with a gold wing ha!!!