Wish I remembered to take a before shot, my sink was covered in drywall mud, paint, sawdust, it was awful and I could not see it as a cleaning tool!! Now I don’t use chemicals as much as possible so I took out my vinegar and baking soda.
Put in the plug, dusted it all over with powder and poured just enough vinegar in to make a paste with. As you scrub with it you can see it turns brown if the sink was bad like mine anyway. I hate that sticky type feeling stainless sinks gets on the sides. You can let it set if u need it to get through like on paint, or just scrub. I use my hands but u could use whatever u want. After just rinse repeat if u need to for spots u may have missed.
Just a cheap, quick and non chemical alternative.