Came across this picture the other day. Dated December 2004, this was the day we pulled our first Pilatus Porter out of the 40 foot container it had been shipped in. The floor, and the rest of the airplane, was brand new. The last people who had cleaned it were Swiss--you could eat off this floor. The next time you're on an airline flight, when you go to the lav, look down at the flooring...it'll look exactly like the surface of this floor in the Porter. I guess they use the same stuff in most airplanes, but since the Swiss haven't messed with your lav floor, I wouldn't recommend eating off it. For that matter, the day that picture was taken would have been the last one you'd have wanted to use that particular Pilatus Porter floor as a plate.
Our floors get messy. Just about anything and everything goes in our airplanes--if it can fit in the door, we've probably flown it at one point or another. And because we're here to serve isolated tribal people, our priorities are on meeting their needs, not keeping our planes clean.