Originally Posted by DesertRat
It looks like oxidation(from the acid in our skin perhaps, some people are more acidic than others) or clear-coat separation. I'd definitely ask apple about this.
Yes it really weird. I never cleaned it with any other stuff then dry cloth.
But after i used the phone for say 10 min and my hand has covered the whole backside. These dots are all over the backside. If i then wipe it with my shirt the thumprints wipes of but these star dots are still there. But if i rub harder hand way much longer, They disappear too.
On this image i cleaned it hard then i just took my thumb and wiped over the backside and the dots appear again.