When this amateur cups the boards with all that moisture, they are going to need an Air Wolf/Rescue Mat to hope they lay down again! I do screen and recoat with a buffer. Some people always confuse me with a guy using a drum sand, I might just go down that road...
More than once they have hoped that I can take down the board's edges a little. Even with 60 grit screens, which I don't like to use, I might take off 1/16" of wood. My normal rough shape screen is 80 and then 120. My normal screening is with 100 and 150. You definitely take no wood off with 100 or finer. I see water damaged board about once a month and I can't help them. A lot of them are maple strips less than 1/4" thick. Most house built in the north east between 1925 and 1975 have these Vermont maple strips on the floor. The cup easy. They lay back down easy too. The don't mind being buffed, but not so fond of belt sanding. I wouldn't want to wreck them with too much water. I cringe when the people want to clean them with steamers.
If you want to do wood floors the right way,
you need this
and
this
Cleaning hardwood floors is bull crap scamming. I wouldn't do it, don't want to damage my reputation with something that isn't proper.