Q. We're new home builders and use a lot of newly milled kiln-dried eastern white pine exterior trim. We paint it in batches, spraying both sides with a good-quality oil-based primer, then following with two topcoats of 100% acrylic. To cut down drying time, we'd like to switch to an acrylic primer, but most painting contractors we talk to swear by an oil-based primer for pine because it penetrates better. Is there an acrylic primer that would give good performance?