I need a tried and tested method for bringing a real hardwood polished timber floor back to new.

I filled in the big scratches/gouges with a wooden paint pen filler which worked well.
Now its just all the surface scratches all over it left looking crap.
Floors were polished professionally when installed 2 years ago so its not terriable just the scratches.

What is a product and method to use to rub into and over the floor to bring the shine back and Get rid of those surface scratches.