Howdy,
A buddy of mine is soon to open a small retail store in an old venue that was, for about 20 years, a hair salon.
He refinished the floors (apparently) by sanding, and then urethaning.
In most areas, the results are fine, but in some areas, he noticed problems.
In one section, the urethane did not adhere to the wood. He told me that a few hours after applying it, he saw small bubbles in that area, and that a few days later, in that section, the urethane was completely worn off with only very light foot traffic.
With a bit of detective work, we were able to figure out the location of the original hair salon chairs, and the position of the customers in those chairs.
Our guess is that years of hair related stuff had dripped from customer's heads and had soaked into the floor preventing the proper curing of the urethane.
Given that he has no way to know just what that "stuff" might be, what is a reasonable way for him to proceed?
Thanks for any help on this,