Some home chores become second nature. Take painting, for example: You throw down a drop cloth, grab a brush and get to it, right? You might even be able to quickly tally up how many gallons of paint and primer you'll need to cover your in-need-of-a-refresh living room. But let's turn off autopilot for a second and step back: What exactly is paint primer, anyway?
We turned to a pro -- Deborah Zimmer, a paint and color expert for the Paint Quality Institute and Director of Communications at Dow Coating Materials -- for the answer. She's spoken about the benefits of using primer before, but we had some more questions for her.