Work one manageable area at a time such as four square feet.
How to floor varnish.
Use your brush to apply the new oil based varnish to the floor.
Use a long handled roller to spread the varnish first in the same direction as the grain then across.
Use less coarse sandpaper usually around a 120 to 150 grit abrasive to get a lovely smooth finish.
Apply the stain with a foam applicator pad in the direction of the wood grain.
Choose an interior wood stain based on the color you desire and the type of hardwood flooring you have.
Apply in sections which are no larger than 4 to 5 square feet.
When making the strokes try to follow the wood grain.
How to prepare varnished floors lightly sand your floor with 120 grit sandpaper.
If your old varnish is flaking off use a floor sander to sand back to the bare wood.
Instructions and help on how to varnish your wooden floor.
This will ensure that the varnish looks natural.
Start at one end of the room and sand with the grain.
Depending on the condition of the floor you may need to start sanding with a coarser sandpaper.
If you want to change or improve the floor color apply a stain.