I have a Microplane zester which does a good job if you want the zest very finely grated. When we bought it it had a black coating, which has now worn off in the middle. I suppose we've eaten it. I also have a old-fashioned zester which scrapes off larger slivers of zest for when you want to see the zest, which I usually do. I have another Microplane for finely grating cheese, ideal for Parmesan.