We report the results of Milestone 3 experiments for the Exoplanet Exploration Program Starshade Technology Activity (S5). The goal of this milestone is to demonstrate through experiment and analysis that solar glint from optical edge segments having undergone ther- mal and deployment cycles remains fainter than visual magnitude V=25 for the WFIRST Starshade Rendezvous Mission (SRM) and HabEx starshade missions.