A method of treating a surface includes providing an object and applying a masking layer to a target surface area of the object. A sacrificial material is applied to a non-target surface area of the object. The method also includes removing the masking layer from the target surface area. The target surface area is exposed to a substance that etches or coats the target surface area. The sacrificial material from the non-target surface area of the object is removed, leaving the target surface area of the object etched or coated by the substance while the non-target surface area is not etched or coated by the substance.