Should I paint my keycaps?

Hello my feathered friends,

So broke old me cannot afford a mechanical keyboard, in place of one I have a membrane keyboard (yuk). Although I cannot help the itch to mod it. I want to paint the keycaps. Has anyone done this and if so how do they feel? Advise for painting them? Any opinions? If I do it (which is a high likelyhood) I will also do a mod log.

I used spray paint for car plastic many years ago and it was fine for a while but over time is started to look crappy, If it was ok I guess manufactures would do it more often. That being said I know Filco make a army coloured one..hmm.

Yeah, I'm hoping to do a matt finish using acrylic and sand the base lightly if that makes any difference.