Restore maple flooring
Define "restore?" Everyone has a different perception of the true meaning. Does it just need a good cleaning? Or a full fledged sand and seal job?
Here you go! I is a lot of messy work, it well worth the effort.
a true restore means sanding and restaining.
After the sanding, what is the best to use for the finish
After sanding and cleaning really well. You need to get all the dust off, you can stain and varnish. Here is a video to help you. It is a big job, if you can afford it, get it done professionally.
This video is how to do it yourself https://www.google.com/search?q=refinish+a+wood+floor&oq=refinish+a+wood+floor&aqs=chrome..69i57.4999j0j7&sourceid=chrome&ie=UTF-8#kpvalbx=_bp7IXdP9PIyU-gSyi6iQBQ44
This video is professional https://inmyownstyle.com/pros-refinish-hardwood-floor.html
Thanks for your advice. I think it is a job for the professional