You have to remove the finish on the floor before you can properly sand out all the scratches and imperfections that have accumulated over the years.
A place that you can rent a hardwood floor sand.
A tongue and groove floor cannot be sanded as many times as a plank floor.
At the home depot tool rental center you can find everything you need to keep your floors looking beautiful including polishers and floor sander rentals.
Typically you would do this with a drum floor sander a large piece of equipment you can rent from home improvement stores.
If you choose to refinish keep these things in mind.
A walk behind sander like a drum floor sander and a floor edger to get into the corners and smaller nooks and crannies.
To achieve professional quality results you must start with the proper equipment to get the job done right.
Sanding removes on average about 1 16 inch of material and sometimes more so you can safely sand a solid hardwood floor two or three times but no more.
Sure it may take longer to remove old finishes than it.
Unless you plan to sand many floors in your lifetime the best choice for do it yourself floor refinishing is the random orbital sander.
Solid hardwood boards are 3 4 inches thick and each has a groove milled in its side that overlaps the tongue of the adjacent board.
The groove overlap is typically about 1 4 inch thick.
You must sand the floor completely several times over with progressively finer sandpaper in order to make sure the floor is as smooth as possible before refinishing it.
Once you re done sanding you can stain the floor.