Nail polish remover is no good for plastic models.
When I've stripped models with Dettol, I find running the tap quite hard to blast the inital sticky paint off (mainly cold, with a bit of hot running). I then fill the sink with warm water and some detergent and scrub, topping the brush up with a drop of detergent every now and again. It all comes off eventually, but it's very time consuming.
It comes off much easier on metals however, just not plastics. You may find the undercoat or strongest colour dyes the plastic. Makes no difference when sprayed however. Don't use hot water, even on metal. Makes the model too soft to give a good scrub too.