What color do you have? I'm thinking of doing black nickel for my bar sink. Also, what shape do you have? Maybe water is laying in it...

I have Crystal Reflections, undermount. The Black Nickel is beautiful! The shape is a 19" oval. Yes, water does tend to pool there but is that any reason to etch the glass. I was able to use CLR on the side of the sink where the water hits using CLR. It doesn't do anything for the area around the drain.

I took a couple of pictures, one with and one without flash. You can see the dull etched looking area around the drain.

Here is a link that might be useful: Oceana Glass Sink, Etched