I plastidipped my grill and a few other parts of my 1:1 car a few months ago, after numerous washes, road salt, etc, it looks just like it did when I first sprayed it. Planning on doing my wheels as soon as it gets a little warmer outside on my day off.
I think it would be fine on an RC body. The paint will peel off when you want it to, but holds up fairly well otherwise. Once the paint cures, it will be just fine. Check out dipyourcar.com on youtube, they have some good info on how to do this for 1:1's that may help with the RC stuff.