Well you won't be able to resell it, but no it's not damaging to the phone or its services.Will it damage your phone if you paint it will nail polish?
nope as long as your arent painting on the screen or keys :) i did a marble effect on mine a few years back and it worked for a really long time untill it got in the washing machine... hahah but no it won't damage anything
nope it won't damage it.
It depends what kind of substances the nail polish has.
And it also depends where you painted the phone.
nope. as long as you dont get nail polish IN the phone.
It might be odd texturally and not look nearly as cool as you thought
But it wont hurt it a bit!
It shouldnt. unless maybe its on the keyboard.
it will still function