Like mentioned previously with a ceramic sink, minor cracks in a porcelain sink can also be fixed with an epoxy porcelain repair kit. However, only a professional worker will be able to assess the damage and recommend a repair or replace. The following is a simple breakdown of a porcelain sink repair.
Evaluate the chip/crack/scratch, in some occasions porcelain touch-up paint can be an easy fix. Remember to get the exact same touch-up paint to the sink’s color.
Clean the chip/crack with any household cleaner, then dry the area.
Use sandpaper to scrub only the chip/crack, the rough texture will allow the epoxy to get a proper hold.
Mix the epoxy porcelain repair kit based on the manufacturer’s instructions. Use a toothpick or brush to only fill in the chip/cracked area(s). When fixing deep chips/cracks, you may need to apply the epoxy in multiple thin layers rather than all at once. Wait 24 hours for one layer to dry, before applying the next one.
When finished run a straight edge across the chip/crack to make sure that the epoxy is at level with the top of the chip/crack.
Allow the epoxy to fully dry for at least 24 hours.
Finally add the touch-up paint over the repaired area.
This type of repair does require a steady hand, patience and delicacy; hiring a trained professional will accomplish the job, as well as prevent any damages during the repair.