Not satisfied with the neon-colored Joy-Con that arrived with his Switch they took to disassembling them so they could spray paint both mini-controllers a shade of deep, forest green. Doing this required unscrewing everything and gently removing the circuit board and battery with all the wires and ribbons still attached.
Truly painting your Joy-Con controllers will require taking them completely apart. The process looks gnarly but the people who have done it say it’s not that bad. It results in a lot of little pieces and the Joy-Con’s innards being completely exposed. It’s a bold proposition considering the controllers come bundled for $80 if they ever need to be replaced. But Retaihec says they didn’t have much problem taking all of the pieces out or putting them back in after the plastic had been painted. The left Joy-Con, being full of more stuff, like the IR sensor, was a bit hairier.
Spray painting the empty plastic was the easiest part, although some commenters chided Retaihec for not sanding the pieces down before hand. They used a no sanding, no priming required gloss paint, however, followed by a matte finish sealant for wood, metal, and “more,” leaving the Joy-Con with a texture that find to them.
And if you like your Joy-Con just the way they are though, you can always find something else to paint, like the Nintendo Switch pro controller.