Denton Municipal Airport, Texas-based Business Air is adding corporate aircraft refurbishment and painting to its existing FBO and aircraft charter, management, sales and leasing services. The three-year-old company has already started an interior-refurbishment project, and it plans to open a new paint facility large enough to accommodate a GIV, in mid-September. In addition, Business Air offers avionics and cabin-entertainment installations, as well as light maintenance work, through strategic alliances.