Prepare
Back to bare wood
Punch down any proud nails, screw down boards that creak, fill gaps with wood filler. Sand with a floor sander or orbital sander, 80 then 120 grit, to remove varnish, wax or oil: floor paint only holds on clean, dull wood. Vacuum, then wipe with a damp cloth and let it dry.
On bare wood, apply our Multi-Surface Primer in the tone matched to the colour; on sound, previously painted boards, sanding is enough. Make sure the room is dry and between 10 and 25 °C, and that you can leave it alone: the hard part is not walking on it.