To remove the black marks scratched by stainless steel hangers on the white ceramic wash basin, you need to prepare: wet rag, toothbrush, and baking soda. The detailed operation method is introduced below:

1. First, follow the steps As shown in the picture below, pour an appropriate amount of baking soda onto the black scratches on the white ceramic wash basin. Baking soda has a strong decontamination ability and can effectively remove the scratches on the wash basin.

2. Next, take out the toothbrush and use the toothbrush to scrub the black scratches on the white ceramic wash basin as shown in the picture below.

3. Next, take out a wet rag and wipe the black scratches on the white ceramic wash basin with the wet rag as shown in the picture below. At this time, the black scratches on the wash basin can be wiped off. .

4. Finally, as shown in the picture, you can see that the black marks scratched by the stainless steel hanger on the white ceramic wash basin are gone.