The house we go to in florida has a black shell shaped sink. It shows every spot when it dries, I would never have a black sink! Just my experience.
Kathy G in MI

Black is horrendous...Cast iron is prone to spider cracks (which will show up as white). You will see every scrach, every soap stain

its true,every thing will show,

I have had the Kohler Brookfield Black sink for four years and really like it.Everyone told me I would have problems with it and I have not. I also have a black toilet in the Powder room and have no more problems than with the white toilets in the other bathrooms.

I use bar keepers friend on the sink. If I am expecting company, I wipe it down with a paper towel and all surface spray cleaner and it leaves a mirror like shine-no streaks.

It has not chipped. I do not have any white cracks, etc.

I do have the black plastic coated wires racks that Kohler makes to fit the sink. It keeps things directly off the bottom.
It is much easier to take care of than the SS sink I had before.

I have a black kitchen sink. It is cast iron and was in the home when I moved in. It is not in great shape cause the porcelin is very scratched, I dont know what prior owners used. I have heard that you can clean it real good then use car wax to shine it. I just haven't had the time to ever do this. It is not chipped anywhere no cracks and still works well. If anything falls in it, well the sink wins for sure. When I redo my kitchen it will be stainless for me cause I want undermount and will only do contemporary/modern kitchen.

We just did a kitchen remodel and purchased this sink. I am so disappointed in it. It shows every pot/dish mark/scratch. I used cooktop cleaner on it and was able to get some of the marks out. I have the SS racks in it, and I'm very careful when doing dishes but I still have marks, and a couple of deep scratches that I don't even know how they got there. The sink is beautiful, but it is worthless if you have to be so careful and not worth the headache. We are going to take it back unfortunately..

been having a black cast iron sink for 10 yrs your research is correct hard to maintain very prone to scratches. It only looks clean if you dont use it. it looks beautiful when first installed but over yrs even expensive cleaners will not make then look nice. If you can afford to replace it every 2 yrs then its a good choice. mine is set in dark colored granite. Neutral colors are much easier to keep clean. I have ocd that black sink and dark colored granite absolutely kills me. You can wipe it over and over it still shoes much stains from water and the sinl is basically a hazy looking grey over the years. Regular stainless steel with no glossy finish is much easy to clean and stands the test of time.

opps lots of typos.

I have a black Kohler sink. I've had it for almost 20 years now, but yes, it is full of scratches. Mine is a top mount, so the rim is what actually looks the worst. I'm ready to change out the countertops, and I'm going with either stainless, or copper (if I can afford it. I love the green patina on copper)

I have the black sink as well and i hate it! My hubby had it scratched up within days of purchase.. i am gonna try the car wax suggestion and see if it helps with the scratches

I have and had multiple Kolher sinks over many years. My 1st black kitchen sink was amazing the finish was beautiful for 15 years. i moved and built a new home, i currently have the same sink by Kohler but the quality is not the same and looks very dull. i’ve tried many ways of cleaning it but always looks dull. i don't have issues with chipping or scratches, i purchased the black coated racks and always have them in the sink.

i have a white pedestal Kohler sink in the guest bath which has one long scratch which is very noticable. No way to fix it. Looks bad.

i also have a black sink and toliet in my master bath for 17 years and they both look amazing. But with black you need clean it often.

My company is going to replace this sink with another Kohler; the first one they shipped was damaged. The rust at the drain is from the cast iron of the sink; no cure. This sink isn't in too bad of shape for cast iron, unlike a lot of them I see.