I have heard about this problem happeneing in the past. I've not heard that it's caused any paint damage, but if the seal around the mirrors breaks, the viscious liquid inside of it will leak out and they will not heat up like they were designed to do.
This happened on a Suburban on chevysuburbanclub.com and I think the just eneded up calling around to auto glass/mirror places until they found one that stocked it.
I think when I got my car washed, it mixed with the liquid, then when I drove off the mixture dripped onto the door. It looks like typical water spots dripping from the mirror, but they have eaten into the paint and couldn't be buffed out. I don't even know how to turn the heat on for the mirror, do you?
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