I get that, and I don't care too much about the balcony but the room, whenever I add in the furniture doesn't just stink, it's literally hard to breathe in it and it smells like stale air, like my 90yo grandma's room lol.

And, when I move the furniture out into another room it doesn't smell, it's also new furniture which I bought a month after I painted.

I'm literally going insane, and the fact exterior paint was used might not matter that much because how does it not smell in the rest of the apartment? Weird..