LOVENIN, a Nintendo fan from Thailand, messed up and bought a black & grey Switch instead of a Neon one. To add some colour to his drab new console, then, he decided to take it apart and add some Gundam flavour to the thing. Looks great!
https://kotaku.com/the-nintendo-switch-joy-con-look-way-better-with-snes-t-1794141073
A big reason why it looks so good is that he didn’t paint over the top of a complete Joy-Con; as you can see, the controllers had to be disassembled to be repainted and ensure a pro finish.
You can see more progress (and finished shots) here
Thanks Buchan!