Answer: anodize

AnswerCrossword Clue
ANODIZEPut on a protective coat, as with metal
ANODIZEEnhance by coating, as metal
ANODIZESubject to electrolytic action
ANODIZECoat metal
ANODIZECoat electrolytically
ANODIZECoat by electrolytic action
ANODIZEOne way to coat a metal
anodizeto give a protective coat, also ANODISE
anodizeto coat a metal, esp. magnesium or aluminum, with a protective film by chemical or electrolytic means
anodizeto subject (a metal) to electrolytic action as the anode of a cell in order to coat with a protective or decorative film