After sweeping, scraping with putty knives, sweeping again, cleaning with a steel wire brush in a drill and mopping twice - today was the day to apply the Ospho. For something so simple it is sure difficult to apply right, or maybe it's just me. I have never applied anything that thin before and I swear that it was the last 5 feet of the floor that I finally got it right. The other 30+ feet... well, lets just say I may have some sticky spots, time will tell. At least I have to work tomorrow so it will have till Thursday to dry. If I do have sticky spots, what is the fix"?