Many of the boards have separated slightly and left gaps 1/32-1/16". I would like to fill these cracks.
My wife just wanted to wax the floor but it needs a sealing topcoat. Someone suggested oil, but oil offers nearly zero scuff resistance and no moisture resistance.
My plan is to clean the floor very well. Use a wood filler that is similiar to the existing color or slightly darker to fill the gaps, then recover the floor with shellac. I chose shellac because it is easier to work than varnish, doesn't smell much, dries very quickly, isn't finicky about surface prep and is easy to repair.