With a scraper or putty knife, scrape off peel-and-stick vinyl floor tile.
Once vinyl tile is removed, with a crowbar, remove any remaining floor backer/masonite until hardwood floor is exposed.
Sand wood floor with a belt sander until smooth.
Using an oil-based paint of your choice, apply 2 coats of paint with a large roller to the floor. Let dry overnight before walking on the floor.
TIP: Use a paint roller with a built-in handle extension to save your knees and back!