u/Automatic_Way5732

​I recently rescued my childhood 3DS. Even though I always kept a case on it when I was a kid, I found two small cracks. One is very tiny on the hinge (more like a deep scratch, you maybe have to zoom to see it), and the other is on the back corner of the top screen. This second one is a proper crack, but it feels sturdy; it doesn't move, though it seems to go deep into the inner layer.

​I want to prevent the hinge crack from spreading and ideally fix or seal the crack on the top shell.

Any tips or recommendation?