
Believe it or not, I am having better luck painting in the winter, shooting in the back room of my basement (separate from the regular basement that I can ventilate with a walk-in door). I can use lighter coats, with a 20-30 minute wait in between. It's slow going, but I found that the paint "hammers" better because it has more time to work before it flashes, and I have better luck keeping vertical surfaces from sagging. I shoot in the back room on a board, and carry it into the warmer main part of the basement to set until the next coat. As an added bonus, my recoat window is larger, but the paint is pretty dry after 24 hours.
Just thought I would pass it along in case anyone is as frustrated as I was. It may be something to try.
Jeff