u/Archi_penko

I have a covered sun porch, which is screened in on 3 sides, so some water does get in when it rains. I am tiling the 8x12 room, which is currently painted concrete. I was going to apply a liquid or sheet membrane, but just realized the paint may be an issue. Do I need to strip the paint first? Are there any good (not looking for shortcuts, per se) options to use so I don't have to strip the paint first? The floor is in good shape otherwise, with no cracks and is pretty smooth.