Engineered hardwood flooring is usually a particle board base topped with a wood veneer surface that's fully finished when you buy it. This means that if the surface becomes marred, gouged or dented, you can't sand down past the damage and into the base repair it, or you'll take off the veneer. You can fill those dents and gouges with wood putty and re-gloss the surface over the repaired areas.
Things You'll Need
Wood putty (matching shade with the flooring)
Putty knife (plastic)
Sand out the inside of each dent using your 200-grit sandpaper. Fold the sandpaper into a triangle, if necessary, to get the edge of the paper into the dents. Get the interior of the dents free of shine. Blow off the dust.
Use your thumb to press wood putty into the first dent, packing it down tightly and letting it mound up a little on top of the surface. Repeat for each dent.
Flatten the putty by pushing your putty knife forward through it, "cutting" it off at the level of the floor. Repeat for each dent.
Let the putty dry eight hours. Lightly sand the surface with the sandpaper to smooth it out. Wipe up the dust.
Dab polyurethane over the area of the putty, using a small paintbrush. Let it dry for six hours.
Lightly sand the new gloss to slightly dull it. Add on a second layer of polyurethane. Let it dry 12 hours. .