My iPhone 6s+ Rose Gold's paint is constantly getting chipped off down to the bare aluminium. Is there any way to fix this? Preferably a touch up paint or something that I could purchase? I browsed the iFixit guides and found a way to replace the whole casing/housing, but its has a rather hefty price tag (80-90$ just for the housing) plus, I don't feel like messing around with it. How much would you reckon it would cost if I bring it to the apple store? Searched around for touch up paint but couldn't find any.