My Viattorre cues' butts have urethane finishes. If I have time, I use the 3-step automotive detailing process (polishing, glazing & sealing, then waxing)* using MOTHERS polishes & waxes, if not, I just use a cleaner wax. I do this at least once a month since I only get to play 1-2x/week
*Polishing- removes any oxidation & brings back the wet look (especially for old finshes)
Sealing & Glazing- fills in small scratches & gives that mirror/candy-like coating
Waxing- seals the previous steps & provides the sacrificial layer of protection