 So above the drop ceiling, did you paint that surface as well? No, we didn't. What did you paint with? Did you use any kind of a primer? Going over paint, so we didn't. We just used a regular latex paint. Right, so the best thing to do in a situation like this is to use a very good quality primer, either an alkyd primer or a solvent-based primer, because it tends to seal in all of those wall and ceiling surfaces, including the odors that are underneath.