It isn’t just for Easter Eggs or salad dressing.
I’ve heard about mixing up vinegar and water to clean mirrors and windows. I grew up using a vinegar soak to keep new bikinis bright. Recently, I learned that there’s a whole community online talking about the ways you can use vinegar and other natural ingredients in household cleaning.
I guess I have hard water because my sinks have gotten this gunk from limescale that won’t come off with regular cleaners. I was googling what to do about it, and I came across vinegar. Articles said to soak a cloth in vinegar and let it sit on the spots for a few hours. On some sinks, I had more luck than others.
In the bathroom, I poured the vinegar on, scrubbed a little with an old toothbrush, and then poured a little more on and let it sit for about half an hour before the white stuff just scrubbed right off. It felt like a miracle!
The kitchen was a different story. I probably should have tested a small spot first, because the vinegar wasn’t working so well. One site suggested putting a ziplock over the vinegar soaked cloth, so I tried that and left it on for a few hours. It ATE AWAY at the finish and seemed to corrode part of the faucet. Yes, the green limescale came off of the sink, but so did some of the finish. My boyfriend came over and was excited because he thinks the sink looks a lot better, but I’m voting for a new fixture.
Anyway, I would say that the best thing to do is to scrub with the vinegar and to leave it on for only a little while. I wouldn’t do the whole vinegar soaked cloth thing again. It seemed like a lot more work, and not really worth the risk of corroding the sink.
Roadside Rehab 
Try barkeepers friend.