Concrete paving and whitetopping have been pretty hot topics over the last year. With the National Ready Mixed Concrete Association (NRMCA) stepping up promotional efforts on parking lot paving and the American Concrete Pavement Association (ACPA) encouraging people to "kick the asphalt habit" in general, contractors have been finding support in venturing into this service. My magazine, Concrete Contractor, published an article on concrete whitetopping in the January 2009 issue, detailing the specifics of a concrete whitetopping job at a strip mall parking lot. If you're looking for further education on concrete overlays, the ACPA offers a free 75-page publication called "Guide to Concrete Overlays: Sustainable Solutions for Resurfacing and Rehabilitating Existing Pavements" downloadable in PDF format. At the same site you can access a PDF of a "Summary of Concrete Overlays" poster, which would be an educational addition to any concrete company's office wall.