I saw a video from the amazingly talented DaftMike where he designed and assembled an NES with working cartridges (over NFC). All this was well before Nintendo released the NES Classic and sent scalpers in a frenzy.
Printed DaftMike’s MiniNES model, sprayed it with some filler primer, airbrushed with best guess colors, wired in some USB ports for the front, an LED power light, and finally some switches. Pretty straight forward – especially considering how mature the RetroPie project is.
Super Glue shouldn’t touch paint.