My recommendation for calming down hot, sore windsurfers' hands, (without compromising much prized callouses!) is a product called 'Climb On'. It comes both as a solid bar, that you rub around your hands like you would with soap - great for straight off the water, or in a tube as a rich cream for more intensive repair (use overnight, as it is very greasy!) A 1oz bar lasts for ages (eg a year!) and all those that we have introduced to it are converts because it does actually work. It kept our soft, winter hands which we had not wrapped around a boom for months in perfect windsurfing condition for 2 weeks of intense sailing in Margarita, while all around us had their blisters strapped up with duct tape within days!
I have never had blisters since starting to use it 8 or so years ago, but if you do get blisters, pack them with 'Climb On' and it helps them to heal much more quickly. The cream is also good for calming sunburnt/windburnt and chafed skin.
I usually buy 'Climb On' on line, but it is available from some outdoor shops. The name clearly indicates that it is aimed at Rock Jocks with abraded fingertips, but I think that it is a fab product with equal application for we wind junkies!
I have found that in general, gloves don't really work for windsurfing. I do have a pair of full-fingered, shaped, ProLimit gloves with a neoprene back and leather palm which seem to be the only ones that do not pump up my forearms. I use them to ward off wind chill in winter rather than blister avoidance, however. Sometimes, gloves can cause blisters.