So What is Powder Coating?
Powder coating has been used since the late 1960s. It was hailed as an alternative to other methods of surface coating that would bond the finish directly to metal. You can bet if your railing isnt Chrome its Powder Coated. Many products that live outdoors are powder coated both to protect and to beautify the article. Powder coating is one of the most durable colour coatings available and, with very little effort on your part, it will provide you with many years of excellent service.
Three steps to cleaning your powder coating.
Carefully remove any loose surface deposits with a wet sponge.
Use a soft brush (non abrasive) and a dilute solution of a mild detergent, eg, pH-neutral liquid hand dishwashing detergent in warm water (DO NOT use solvents) to remove dust, salt and other deposits.
Ensure you thoroughly rinse the surfaces with clean fresh water after cleaning to remove all residues.