I have scratches on the floor, not deep enough though and I found this article. It’s a great thing that I don’t need to do alot with it but just refinish it.
Here’s the steps that you can do yourself:
Clean the Floor
Remove all the furniture, and spray the floor with a hardwood flooring cleaner or your own mix of 10 parts water to 1 part white vinegar. Gently wipe the floor with a terry-cloth mop or a towel wrapped around a mop head. Close the windows and doors to keep dust contained in the room you’re sanding.
Prep the Perimeter
Using 180-grit sandpaper, hand-sand the perimeter of the room and any nooks that the buffer can’t reach. Rub with the grain 4 to 6 inches out from the baseboard, working over each board until the finish dulls and a powder forms. Don’t use a sanding block—it might miss uneven spots in the floor.
Scuff-sand the Finish
Stick a maroon buffing pad to the buffer, and put on a dust mask. Move the buffer from side to side across the floor in the direction of the grain, overlapping each course by 6 inches. The old finish turns to powder as you go, so it’s easy to see the areas you’ve covered. Keep the buffer moving at all times, but stop every 5 minutes or so and vacuum the pad.
Vacuum and Tack
Leave the room for 10 to 15 minutes to let the powder settle. Put a clean filter in the vacuum, and sweep the floor using a felt-bottomed attachment. Work in line with the flooring strips, then sweep across them to get any powder that settled between the boards. Finally, dry-tack the floor with a microfiber cloth pushed with the grain.
Cut in Along the Edges
Roll Out the Poly
Pour out a 1-inch-wide stripe of finish in line with the grain—only as much as you can spread in 10 minutes. Using a long-handled roller with a ¼-inch nap cover, roll out the finish with the grain, then across it. Overlap each pass and work quickly to keep a wet edge. After 10 minutes, brush more finish along the edge, then pour and roll again for 10 minutes. Continue until the floor is covered. Wait 3 hours before recoating and a week before putting back furniture.