If you do decide to paint it use a thick nap roller 3/4 or even a 1". One thing to remember about using rollers, it will take a few dips into the paint followed by light rolling to get paint worked into the nap of the roller. Do not run the roller dry!!!!!!! Keep it wet and do not press to hard to compress the nap on the roller. This IMHO is a perfect place to use a lambskin roller cover. Holds more paint and does not crush as easy as a synthetic cover.
I still would learn to love it.
Fantasy Walls and Windows
The funny thing is, if you shortcut it by only doing one coat, the swirls can actually flash through your newly skimmed ceilings. So at least do 2 coats, and, yes, it may take THREE coats as Brushjockey said.