To get stains out of a Porcelain kitchen, follow these steps:

1. Make a paste of baking soda and water. Apply this paste in the stained area of porcelain kitchen.
2. Allow the paste to sit on the stain for about 10 to 15 minutes.
3. Use a soft-bristled brush or a sponge to gently scrub the stained area.
4. Rinse the area with water.
5. If the stain persists, make a mixture of equal parts vinegar and warm water. Apply this mixture and give it some time to rest
6. Use a sponge to gently scrub the stained area.
7. Rinse the area with water and let it dry.

Note: Avoid using abrasive cleaners or scrubbers that can scratch the porcelain surface.