Hitchhikers on the Wood Floor Job Site

Through many of our daily jobs, many of us hold off on a final coat until other all other trades are finished. During your final floor prep, though, other trade(s) can sneak across the floor and, unknown to you, leave a grain of sand or two. The next thing you know, you pick up a grain of sand (hitchhiker) with your buffer and this happens…

… one swirl all over your floor. The question is: What is the best protocol for the floor finisher?