So basically I bought it somewhat cheap (90€ including shipping) and i wanted to restore it to the best state possible, I don't want to leave it on a shelve without using it tho, I wanna restore it, add a clear plastic case and use it as my main 3DS. The thing is, buttons (Dpad, A B X Y and power button) are crunchy, like they are peeling off. I bought some replacement buttons from but they are black (or gray) and white not gray and yellow.. But I guess in a way that will be fixed, also the L and R buttons dont work much, they are kind of stuck so I also bought an L and R trigger module replacements.  
Last but not least let's address the elephant in the room! The huge scratches on the outer shell. I promise in person they are much more visible, there aren't many scratches but there is this big deep scratch on the top of the 3Ds and i'd love to fix it. I though of dropping a tiny amount of UV resin but i'm afraid ill ruin it... I also thought of buying some plastic polish but I'm afraid that will make the zelda design wore off...

There's also this big scratch to the side of the device, so you can see the white color of the plastic, and I have no idea how I can approach that. There are other small damages but they are pretty much what I stated here so I won't be taking pic of the whole thing.

I'm lucky the screens are perfect and so is the interior of the shell. It also doesn't have the serial code sticker :D

I need tips ! Thank youu

[3DS] Help! I bought this pretty Zelda edition 3Ds and I want to restore it.