1. General: Researching roof coatings: for a source of fairly objective information, a good place to begin is at this search results page for "coatings" at the website of the National Roofing Contractors Association. Information from roof coating manufacturers can be biased, and information provided by contractors who specialize in applying roof coatings can be downright misleading.
2. Aluminum Coatings: "Recommendations for the Application of Aluminum Roof Coatings" - practical guidelines put together by the the Roof Coatings Manufacturers Association.