I spent most of Monday shining our hardwoods.
We applied water-based polyurethane two years ago, but daily grit had dulled its sheen.
For a quick boost, I turned to an acrylic copolymer interlocking floor finish. In other words, liquid wax. It's what janitors buff on industrial floors.
This product is often sold under the brand name Top Gloss, but you can buy Rubbermaid's version at Walmart.
I first learned about Top Gloss from cleaner extraordinaire Don Aslett. It's now one of my top tools for readying a home for sale--or making any kitchen feel new. What Top Gloss does for worn vinyl floors is nothing short of a miracle!
You simply mop a thin coat or two over any clean, hard-surface floor. The finish levels itself, filling in scratches and forming a protective layer. Over time, this temporary finish will dull, especially in walkways. Either buff to renew its shine, or strip it and apply a fresh coat. At $25 a jug, it's not cheap--but it's an economical alternative to refinishing floors and much, much quicker.
(One $25 jug will cover a kitchen floor several times over. I was lucky enough to spot a half-empty jug at a yard sale, enough to do my whole house.)