 I'd seal everything and I would use a good quality oil-based primer like a Kills, for example, and I would prime the heck out of everything because that does a good job of sealing out those odors. That and some just normal ventilation ought to do it. But I think if you don't prime those surfaces, you won't be able to completely get rid of that odor. And then, of course, it goes without saying that you've disposed of furniture and curtains and things like that.