As with painting, a beautiful, long-lasting finish on timber depends on preparing the surface properly. Before applying any exterior timber coating it is important to remove all the dead timber fibres and surface contaminants that discolour the timber and impede the even absorption of the coating. Feast Watson Woodclean is a powerful, oxalic acid-based preparation treatment that aids the removal of oils, mould, stains and tannins from new and weathered timber. Ideal for rejuvenating grey, weathered timber, Woodclean is suitable for restoring decking, outdoor furniture, fences, pergolas and other exterior woodwork.