We remodeled our kitchen 3 years ago , and a farm sink was a must have . We purchased the Vigo 30” and have been very happy with it , no issues with staining at all , I cook every day and wash all my pots and pans by hand. About a year ago I started to notice some crackling marks in the interior , and it’s slowly gotten worse . When I touch that spot it’s matte not shiny like the rest of the sink , I’m not sure what to do about it and I’m afraid it’s going to get worse . Including a photo of the crackling part .