I have a 15m2 basement. It's located partly within the house so I only have one outer wall. The walls can get a bit damp in the summer (high humidity = condensation). There are two ventilation holes. I wasn't planning on using the basement for anything, just existing. My question is, what is safe to paint the walls with? I think they were lime-washed once a long time ago. Maybe something like fyle paint or another breathable paint? 