"You don't need to spray to get a smooth finish," says painting contractor John Dee, who has worked on a number of This Old House TV projects. He often brush-paints cabinets anyway because it gives him more control and avoids the risk of paint spray ending up where it's not wanted. (Surface prep is the same whether you spray or brush.) Brushing is time-consuming, he warns, and could take up to a couple of weeks to complete. But the result is a durable, glass-smooth finish that's the equal of anything from a spray gun. "You just need to use the best materials and take the time to sand and do the brushwork right," Dee says.