We were thinking of getting our 40+ year old bathroom sink and tub reglazed. I have heard good and bad reports about it. Each refinisher we have called uses a different type of product,(or are they basically the same), acrylic, Urethane, synthetic Porceline, Acrylic Polyurethane, acrylic Urethane, etc. Since our sink is imbedded into the counter-top tile, we would have to redo the counter top if we wanted to replace the sink. My question basically, is which product would give the best results and longest service. OR would we be happier just replacing the counter and sink.