By Steve Gravelle, correspondentCEDAR RAPIDS — Brock Staley’s out in his garage on a winter afternoon, cleaning under the hood of a Chevrolet SUV.“You don’t want to do it with a pressure washer because there’s too much electronics,” he said, applying cleaner and protectant to the black plastic shrouds and covers that make up much of a modern vehicle’s engine bay.It’s been his livelihood for just short of a year, but Staley’s been detailing cars since before they called it “detailing.”“We grew up around old cars, and Saturday morning was always our time to be together,” recalled Staley, 48.