This is the nicest sink I’ve restored. Before and after pics. I made sure the whole thing was clean and then brought to 200+ grit then sealed with black silicone the with oil, My own 100 year old refinished all brass drain too. This is high-end Alberene stone. Yes, it’s the sink below in the blog under “Ooh what will this look like”? covered in lead paint etc. Thanks. Eric, 508 826 9981.