Also on these boards
Painted wood floor: fill in any large gouges or scrapes, and sand the entire floor lightly. you can use nearly any paint on the floor, but if you're concerned about it rubbing off with traffic, talk to the people in the paint store/department. you can also get clear acrylic sealer to paint over the floor once it's dried and once cured, it'll protect the paint job.
Hmmm, not sure about this concept (Jim Lambie's Floor Installations) for my home, but in the right setting it is an amazing idea. Perhaps a good project for the kids? Give them a ton of different colored rolls of duct tape and the basement floor and tell them, "Have at it"!