Wood – Fix localized wooden parquet floor scratches

Epoxy solutions in general last longer than polys. They do come with residential drawbacks too in that they are harder to patch and don't handle temperature differences as well.

I personally have used bona industrial for high traffic areas. I would really look into the industrial products so you don't feel the need of yearly upkeep.

In my experience, it will tend to make them look a bit better as opposed to worse. The polyurethane will obscure some of the scratches, diffuse some discolorations to make them less noticeable, and the added gloss will also make imperfections a little less visible.

The flip side to this is that it will make it much more time consuming to do a full refinish in 3-5 years, especially if you are putting down enough polyurethane to give any sort of appreciable protection from further damage. Also consider the added time and hassle of clearing out furniture, dust issues from sanding, etc. The absolute best time for refinishing a floor is when the house isn't occupied yet.

As far as the "right decision", there really isn't one - you can price out refinishing with a high traffic, durable coating and compare that against sanding off 2-3 coats of polyurethane in 3-5 years and then refinishing.