Glossy black refrigerators, like cars, have a layer of paint beneath a layer of glossy finish. The base metal of the refrigerator is below both of these layers. Typically, light scratches only damage the shiny, hard layer of polish that sits above the paint. Sometimes, deeper scratches may penetrate the paint. Each type requires a different method of repair.
Scratches on automobile paint surfaces are very common, and there are a wide range of products available to help remove them. These products can also help you if your black refrigerator becomes scratched. The basic process for removing or repairing slight scratchess to buff the area with a polishing compound and then applying a layer of wax finish. The polishing compound removes the scratch and the wax polish fills in the gap, leaving behind a smooth, flawless finish.
If the scratch is deep enough to remove the paint and the glossy finish layer, penetrating all the way down to reveal bare metal, the only way to fix the scratch is to paint it again. Some manufacturers have paint pens or touch-up paint available that matches the appliance color. Painting over the scratch, then polishing and waxing after it has dried is the only way to remove these scratches.
Apart from repairing scratches to your black appliances, you can also take steps to prevent them. You should only clean glossy appliances with a non-abrasive soft cloth, such as a microfiber cloth or similar material. Don't use paper towels as they may leave tiny scratches. You should also check the appliance's owner's manual for information on how to properly care for your refrigerator.