Patent ID: 8798782

Claim:
a method for refining polishing accuracy across a curved surface of a housing, comprising: polishing at least a portion of the curved surface of the housing that includes a plurality of clustered scribe marks etched across at least a portion of the curved surface of the housing, the plurality of clustered scribe marks comprising: a first plurality of indicia at a first location, each indicia having a different predetermined depth dimension, a deepest one of the indicia having a depth no greater than a maximum material removal depth, and a second plurality of indicia at a second location different than the first location; optically checking a material removal amount around the portion of the curved surface of the housing that includes the plurality of clustered scribe marks by observing how many of the indicia remain visible; and adjusting the polishing to cause an amount of material removed during the polishing at the first and second locations to be about the same.