The primary objective of this work lies in reinforcing the polymer core of a Polymer Metal Hybrid (Metal/Polymer/Metal) composite panel with natural fibers to progress towards a greener composite. Taguchi's method is used to design the experiment in order to achieve the optimum sample size. The current study uses Aluminium grade AA5052 as face sheets. Three widely used unsaturated polyester resins- Vinyl Ester, General Purpose and Isophthalic resins are used as cores after being reinforced with Banana, Sugarcane and Coir Fibers. The flexural and fracture properties of the composite panels are tested, and the influences of the resins, fiber and fiber percentage are studied. The results are optimized by using the ANOVA statistical analysis and regression equations are obtained for varying parameters. © 2018 UPB Scientific Bulletin, Series B: Chemistry and Materials Science. All rights reserved.