I have tried everything and the cheapest and fastest strategy is to use furniture stripper and medium steel wool and scrub the finish off, first with a scraper, then with medium steel wool, this will remove any small dents also. This process will leave the original stain in place and the stock will look nice, but not shiny at all. I actually like this look, but you can then rub in true oil or a hand rub varnish for more protection. Then finish with extra fine steel wool or wet sandpaper 3000 to give it a final smooth finish. Sanding is only for serious repairs, avoid if possible.