First, insure the integrity of the floor, not sure on how to do that, maybe contact a construction person. If floors are still good, use a floor sander to get rid of any loose or badly stained debris. Then refinish them in a stain/poly, or paint, your choice. You could also install some tile or carpet.
Sand the burned wood lightly going with the grain of the wood, and then rub mineral oil and scrub with fine steel wool, again, going with the grain. Wipe away the area, make sure it's clean, and refinish the floor. Good luck!
First, insure the integrity of the floor, not sure on how to do that, maybe contact a construction person. If floors are still good, use a floor sander to get rid of any loose or badly stained debris. Then refinish them in a stain/poly, or paint, your choice. You could also install some tile or carpet.
Sand the burned wood lightly going with the grain of the wood, and then rub mineral oil and scrub with fine steel wool, again, going with the grain. Wipe away the area, make sure it's clean, and refinish the floor. Good luck!
if you just want to have the plywood for a base, you sand and add wood filler, let it dry and paint over it before adding a new flooring.