Wash the exterior of cabinetry with water and a soft cloth or sponge as needed. If the cabinetry is particularly dirty, wash the exterior with a mild detergent as you would clean a car. A soft-bristle brush may be used to remove dirt if needed.
Dry the cabinetry with a soft towel or chamois to prevent water spots.
To enhance the cabinetry's appearance, wipe it periodically with a vinyl protectant, such as Armor-All, using a microfiber cloth.
Do not use anything abrasive to scrape or scrub the cabinetry, as this may permanently damage the surface.
Do not paint or stain the cabinetry.
Pool chemicals (such as chlorine tablets, liquid chlorine, acid, etc.) will not damage the cabinetry, but their fumes may damage the hinges over time. To limit damage to the hinges, periodically apply a stainless steel protectant or silicone spray.
Stainless steel items such as door & drawer hardware, grills, appliances, and other components of your outdoor kitchen, when separate from the cabinetry, require maintenance. There is no such thing as a maintenance-free metal anywhere in outdoor kitchens. Remember, stainless steel is engineered to be stainless. It is not stain-proof steel.
Carefully follow the care and maintenance instructions provided with your grill or other outdoor appliance. All grills require surface cleaning and a protective coating.
Door hardware should be periodically cleaned with a stainless steel cleaner and protected with a stainless steel protectant afterward.
You can use a Scotch-Brite pad (gently) and WD-40 to remove surface corrosion and marks from door and drawer hardware.
Be careful when using abrasive materials to remove stains or rust from stainless steel, especially on grills. Stainless steel has a grain pattern. Aggressive scrubbing, especially in circular motions or against the grain, can mar or scratch stainless steel. Always follow the instructions for your particular appliance exactly.
It is essential to clean and protect stainless steel on a preventative basis. Do not wait until there is a problem to begin maintenance on steel items.
Outdoor kitchens on oceanfront property or near saltwater should be cleaned and protected much more than typical.
Many appliance manufacturers will not cover staining or corrosion under warranties if it is obvious that preventive maintenance has not been performed.
Please note that grill covers do not replace the need to clean and protect stainless steel. Sometimes, covering a wet grill traps moisture against the metal, which can promote corrosion and rust.

POLYMER CABINET IN A WATER DISPLAY
SHORT VIDEO ON CLEANING POLYMER CABINETS