A mirroring mechanism, dubbed retrodirection (as opposed to (simple) reflection) was recently introduced in connection with polarimetric measurements in chiral or in gyrotropic media [1]. It has been shown that a specular return from a number of mirrors, combined with the nature of the individual mirrors (being individually reflectors or retrodirectors), and the materials involved, determines the overall systemic properties for the returned electromagnetic waves, i.e., whether polarimetric effects are enhanced or canceled.The present study focuses on the relevant properties of corrugated and cylinder lined surfaces. An exact analytic solution for these geometries is not available, hence two strategies are employed here for relevant limiting cases: For large (compared to wavelength) cylinder radii or large corrugation steps, a specular model is used. Single specular scattering then