I am considering adding another protective coat of polyurethane to my kitchen floor. What preparation is necessary prior to application, and what product would you recommend?
Michael Dresdner: This is your lucky day. At least one company, and probably others, makes a kit called Varathane Renewal specifically designed to allow you to recoat any existing floor finish with a new coat of very durable, waterbased finish and do it without any sanding. I would advise that strongly over any other option as you do not have to contend with adhesion or compatibility issues, which can be a problem unless you know exactly what finish is already on there.