Barlow Tyrie use 316 grade stainless steel for their furniture, which is much harder and more resistant to corrosion than the more commonly used 304 grade. The superior qualities of 316 grade make it preferable for use in marine and coastal environments, which is why it iis often called "marine grade" stainless steel. Whilst 316 grade is highly resistant to corrosion it still requires some maintenance to preserve its finish and the more extreme the environment, the more frequent the maintenance should be. To maintain the finish of your stainless steel furniture Barlow Tyrie recommend you use Barlow Tyrie Stainless Steel Clean and Guard, which cleans the stainless steel and leaves a fine layer of teflon on the surface to help prevent the build up of contaminants.