The use of finishes which will require less time for proper application and still produce durability and protection under aircraft service conditions is highly desirable. Pyroxylin finishes have this advantage and therefore warranted an investigation into their practicability for use as protective coatings for airplanes. The purpose of this document is an investigation of several commercial pyroxylin coatings to determine their suitability for use on wood and metal aircraft parts. The pyroxylin finishes which show a satisfactory film after atmospheric exposure test on metal for a period of one year can be recommended for use on metal parts of aircraft provided the metal surfaces are sandblasted. NOTE: This document has been damaged and is missing the top portion of every page.