Hey Scotty, I was watching videos on youtube of 2015+ mustangs and I noticed how rusty the diff and driveshaft were on all these new mustangs, Is this something to worry about if buying a mustang or is it just surface rust? From what i've read this is common on mustangs. I've also read about somthing called POR15 you can paint over rusted metal and it has good reviews

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na, steel rusts on the surface. You can paint it if you want