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The present study investigates the effect of surface polishing on the tribological performance of two notably different coatings, namely chromium carbide and aluminized, under three-body abrasive conditions. Surface polishing altered the topographical and mechanical properties of the coatings. Detailed analysis of the most relevant roughness parameters highlighted the significance of surface topography under the tested conditions. Polished and unpolished coatings were tested on a pin-ondisk configuration under lubricated three-body abrasive conditions. Silica sand particles were added to the hydraulic oil to model contaminated lubricant conditions. In-situ friction coefficient and wear rate were obtained experimentally. The importance of surface roughness and core void volume in alleviating the abrasive wear was shown. It was found that the dominant wear mechanisms are independent of the coating roughness, however surface polishing increases wear, and does not significantly affect friction.