So my son has profound autism - we're in the process of renovating & have already decorated a number of the rooms, but need to repaint after a matter of weeks 
DS just creates marks, everywhere - drinks splashes/ food/ dirty handprints. It is unavoidable.
Would it be really odd to paint the whole house in bathroom paint? It's so far the only room which looks ok, as I can wipe the walls - even after he smeared charcoal toothpaste across the walls yesterday!