The key to reviving outdoor furniture and keeping it looking good is to make sure it’s watertight and that the parts are protected from the elements. When timber is exposed to the weather, it changes in a few ways. The faded silvery-grey effect is a result of rain gradually washing out the pigments and tannins. Blackened sections also form when harsh UV light oxidises the tannins, breaking down the natural glues in a process that attracts mould and mildew. As it dries out and the original varnish begins to wear away, the top woodgrain is raised, making the surface dry and rough. Follow these tips to bring timber outdoor furniture back to its former glory.