I recently painted my living room walls with SW PROMAR 400 paint. Two months later, there is still a lingering odor in the room and on the walls. It's strong enough that I can smell it when I walk past the room. It is not the smell of paint. I don't know how to describe it. The room is not enclosed and I have opened all the windows for many days. I have put containers of baking soda, lemon water, and coffee grinds in the room to absorb the odor to no avail. SW and the store manager both said they have never heard of such an issue. Has anyone encountered lingering odor from application of SW PROMAR 400 paint? Any advice on how to get rid of the odor?