Interior wall paint should come off fine. It's a standing joke that I always paint rooms bollock-naked as it's easier to shower me off than mess about with paint-covered clothes.
Madness string 88647
At some point, neighbor, it becomes obvious that someone's word cannot be trusted. That's when the relationship is dead and it's time to bury it. If you don't bury dead things, they decay and stink the place out.