After a few seasons' worth of weather and wear, white resin furniture may become stained or discolored. The Institute's Home Care Department found that though almost any cleaner will remove surface grime, only all-purpose cleaners such as Pro Formula 409 and Fantastik All Purpose Cleaner restored whiteness ? even performing better than cleaners containing bleach. To get more life out of resin furniture, clean it at the end of the season, then cover or store indoors. When you take it out in spring, coat it with a thin layer of automobile paste wax for an extra layer of protection.