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I assume this table has some sort of finish over the stain and you are just wanting to freshen it up. Poly will probably be ok over the current finish but it would be best to check a hidden area to make sure. If the poly is ok, lightly sand with 220 grit, dust and apply 1-2 coats of oil base poly. Minwax is a decent, easy to find brand of poly. It comes in 3 sheens; satin, semi-gloss and gloss.
You would only need a primer if you intend to paint the top. __________________ retired painter/contractor  avid DIYer |