An optional procedure at the end of coffee processing in which the dried, shipment-ready beans are polished to remove silverskin and improve their appearance. Polishing does nothing to help flavor and often alters the taste, therefore most specialty coffee buyers do not encourage this practice.

Removal of the grain, scars and blemishes from a hide.

An optional procedure at the end of coffee processing and milling in which the dried, shipment-ready beans are subjected to polishing by friction to remove the innermost, or silverskin, and improve their appearance. Polishing does nothing to help flavor and may even hurt it by heating the beans, hence most specialty coffee buyers do not encourage the practice.

Not always part of processing, polishing may take place after hulling to improve the appearance of the coffee.

The process of removing the remaining trace contaminants from a pre-treated feedwater.