For Mike Scharpp, a lot depends on the weather. As the body shop manager at Leonard Evans Hyundai & Used Car Superstore, winter weather usually means good business. But this year, along with the welcome dents and bent fenders, the early snow had a downside -- keeping contractors from completing roof work and thus delaying completion of the 2,000-square-foot addition to the body shop that was expected to be finished by late November. Instead, the body shop's painters and technicians made do in tight quarters for an extra month, Scharpp said. "You can only do so much work in a two-bay shop,"...