a method for manufacturing a composite part is provided . a polymer materials formed into a shape whose outer surface has a desired part configuration . a base coating is applied to substantially all of the outer surface leaving at least one access to the polymer material . the base coating includes a selected metal existing as a constituent thereof . the same selected metal is then sprayed in atomized form on the base coating covered outer surface . the selected metal in atomized form molecularly bonds only to the selected metal existing as a constituent of the base coating . the polymer material is then contacted with a polymer solvent by means of the access . the polymer solvent molecularly breaks down the polymer material such that it exits the access . as a result , the selected metal in atomized form bonded with the selected metal existing as a constituent of the base coating forms a metallic shell substantially void of the polymer material . fill material selected design performance characteristics is introduced into the metallic shell thereby forming the composite part .