iPhone 5 - black model paint problem

Dear apple community!

I have iPhone 5 black model and edge color was chipped off after very carefull usage! If the paint chips this easy now what's my phone gonna look like in a years time after being in and out of my pocket, car keys, kids getting hold of it... It looks like anything could chip the paint. So my question is what kind of paint or marker I can use to repaint the edge of iPhone and hide that paint chips. I tried with black permanent marker but it comes off easy. Plase give me some advice because I'm desperate sad and disappointed. My new black iPhone 5 looks like trash with that silver dots. Thank you apple once again... 😟