I was surprised finding your location, from your other posts, so far "East Coast", wow; http://maps.google.com/ You live closer to Spain than to me...just across the water, lol.
I would not waste any paint unless trying to use it up as a temp. decoration. The slab temps in the spring/summer lag behind winter temps leaving your basement floor cool where outside warmer air could condense on the concrete- painted or not; pp.4; http://www.buildingscience.com/docum...g-your-basment
Average slab temps are about 10*F warmer than surface water temps because it is 6' below-grade; "Surface water temperatures on the Atlantic side reaches a summer average of 12 °C (54 °F) inshore and 9 °C (48 °F) offshore to winter lows of −1 °C (30 °F) inshore and 2 °C (36 °F) offshore." From; http://en.wikipedia.org/wiki/Geograp...d_and_Labrador