Sand The Floor

I received the tile and it is ready to be installed but first I had to sand the floor. Over the years the floor had been painted several times. I didn't want to strip the paint chemically so I rented a square buff sander. They sure made some tough paint in the past as I went through four sheets of 20 grit paper! Once I finished sanding, the floor was washed with TSP - a commercial heavy duty cleaner/degreaser. I will let the floor dry a few days before I start to lay the tile.