I didn’t mention the 30 years of 3 full time smokers that left a nicotine film even inside of closed closets!  

As others have said, cigarettes are a different issue because nicotine odor and stains can linger and be a real problem.

Mike has a bunch of different letters and just about every permeatation is covered!

Linoleum is made of renewable ingredients, naturally resists bacteria and moulds, it durable and the colour usually permeates through the material.   

I lived a year in MS  and its like living in a petri dish  LOL.. and when I get off the plane in Houston in the summer the smell of dank moldy air permeates the jet way right off the bat...

Despite the rah rah anyone can do it nonsense that seems to permeate the real estate investment business and is the stock in trade of those selling $50,000 mentoring programs, the reality is quite different.So, how does one start?

Look for the yellow nicotine on furnace filters.

If you use latex the nicotine will soak through even latex primer paints.

Check for odors before installing new carpet or flooring because it's possible for odors to be permeated in the subfloor.

When you put one layer over the top of another layer, the heat that permeates through the top layer is reflected onto the back side of the top layer and cooks it.