Ceramic is a durable material that stands up to high temperatures and is easy to clean and maintain. Manufacturers bake a ceramic coating onto a metal surface to create ceramic hobs. But the material is also brittle and can chip and scratch. Impacts on the hob from a heavy item can cause the surface to chip exposing the metal underneath. Repairing the chip is necessary to avoid rust and to restore the surface.
Wash the area with a grease-fighting dish soap to remove cooking oils and surface grease. Use a toothbrush to scrub the chip. Flush thoroughly with water. Dry the surface completely.
Apply a very thin layer of a matching colour appliance paint over the chip. Allow the paint to dry and set for 12 to 24 hours for best adhesion. Apply very thin coats of appliance paint allowing it to dry fully between coats until the repair sits flush with the hob's surface. Stay within the borders of the chip for the least noticeable results. Use an artist's paintbrush to control the paint application.
Wet a piece of 1000-grit sandpaper and lightly rub the repair in a circular motion around the edges to blend it into the surrounding surface.
Choose appliance paint made by or recommended by the manufacturer to best match the colour. Build up coats of appliance paint slowly to avoid paint globs, which increases the risk of paint bond failure. Speed up paint bonding times by warming the chipped area with a blow dryer before painting. Heat the surface so it is comfortably warm to the touch, but not hot.